Electrical conductor and method for producing an electrical conductor

Abstract

An electrical conductor (1) for generating a magnetic field is specified, comprising - a central section (2) having an input interface (3) and an output interface (4), and - an extended section (5) arranged at the central section (2) between the input interface (3) and the output interface (4), wherein - the extended section (5) extends away from a main extension direction of the central section (2), and - the central section (2) is configured to provide the magnetic field within a region of interest (6) being spaced apart from the central section (2). Furthermore, a method for producing an electrical conductor (1) is specified.

Description

[0001] Description

[0002] Electrical conductor and method for producing an electrical conductor

[0003] The present disclosure relates to an electrical conductor and a method for producing an electrical conductor .

[0004] Typically, magnetic fields , which are generated by current carrying wires are limited by a damage threshold, at which an ohmic heating reduces a conductivity of the current carrying wire , leading to more ohmic losses and further heating until the current carrying wire breaks .

[0005] An obj ect to be solved is to provide an electrical conductor, which has improved thermal and / or electrical characteristics . Furthermore , a method for producing such an electrical conductor is to be provided .

[0006] The obj ect is solved by the subj ect matter of the independent claims . Advantageous embodiments , implementations and further developments are the subj ect matter of the respective dependent claims .

[0007] The electrical conductor for producing a magnetic field is speci fied . The electrical conductor comprises or consists of , for example , an electrically conductive material .

[0008] Exemplarily, the electrically conductive material consists or comprises at least one of copper, gold, silver, chromium, titanium . Alternatively or additionally, the electrically conductive material consists or comprises at least one superconducting material such as niobium . Exemplarily, the electrically conductive material is formed of an alloy including at least one of the electrically conductive materials listed above .

[0009] The magnetic field generated by the electrical conductor is in particular dependent on an electrical current flowing through the electrical conductor and on a geometry of the electrical conductor . Exemplarily, the magnetic field is represented by a magnetic field strength and a magnetic field gradient , which are dependent on the electrical current flowing through the electrical conductor and the geometry of the electrical conductor . In particular, according to Ampere ' s Law, the magnetic field around the electrical conductor is proportional to the electrical current flowing through the electrical conductor . The magnetic field gradient is dependent on a change in the magnetic field strength, e . g . , over a distance to the electrical conductor .

[0010] Additionally, the magnetic field gradient is dependent on the geometry of the electrical conductor .

[0011] According to at least one embodiment , the electrical conductor comprises a central section having an input interface and an output interface . In particular, the central section is configured to transmit the electrical current from the input interface to the output interface . The input interface is configured to receive the electrical current to be transmitted and the output interface is configured to output the electrical current to be transmitted .

[0012] Exemplarily, the central section extends within a main extension plane , which is oriented along lateral directions . A vertical direction is oriented perpendicular to the lateral directions . For example , the central section is a planar wire . The central section has a top surface and a bottom surface opposite the top surface . The top surface and the bottom surface are connected by a first side surface and a second side surface opposite the first side surface as well as a first face surface and a second face surface opposite the first face surface . The top surface and the bottom surface each have a main extension plane in lateral directions . The first side surface and the second side surface as well as the first face surface and the second face surface each have a main extension plane in vertical direction . In particular, the main extension surfaces of the first side surface and the second side surface are each oriented oblique , in particular perpendicular, to the main extension surfaces of each the first face surface and the second face surface . Exemplarily, directly neighboring surfaces are connected by edges . Each edge is , for example , rounded or angular .

[0013] Alternatively, the central section is a wire . In this case , the top surface , the bottom surface , the first side surface and the second side surface are formed as a circumferential surface .

[0014] For example , the first face surface comprises or is formed of the input interface and the second face surface comprises or is formed of the output interface .

[0015] According to at least one embodiment , the electrical conductor comprises an extended section arranged at the central section between the input interface and the output interface . In particular, the extended section is not configured to transmit the electrical current from the input interface to the output interface . This is that solely the central section is configured to transmit the electrical current from the input interface to the output interface .

[0016] The extended section is , for example , in direct and immediate contact to the central section . Exemplarily, the extended section is thermally and / or electrically directly connected to the central section .

[0017] According to at least one embodiment of the electrical conductor, the extended section extends away from a main extension direction of the central section . The central section extends along the main extension direction, which extends in lateral directions . For example , the first side surface and the second side surface both extend parallel to the main extension direction . Exemplarily, the first face surface and the second face surface extend oblique , in particular perpendicular, to the main extension direction .

[0018] For example , the top surface , the bottom surface , the first side surface and the second side surface , or the circumferential surface , have a first length along the main extension direction . Exemplarily, the first face surface and the second face surface have a second length oblique , in particular perpendicular, to the main extension direction .

[0019] The first length is in particular larger than the second length .

[0020] For example , the extended section extends away from the central section at least regionally oblique to the main extension direction of the central section . Alternatively or additionally, the extended section extends away from the central section at least regionally perpendicular to the main extension direction of the central section . The extended section has , for example an outer shape in plan view being round, elliptical or polygonal , such as triangular or quadrangular . The polygonal outer shape can be truncated . A truncated region of the outer shape faces , for example , the central section . The plan view is a view along the vertical direction on a top surface of the electrical conductor .

[0021] Exemplarily, the extended section has a thickness in vertical direction, which thickness increases dependent on a distance to the central section . This is that the thickness of the extended section increases , for example , for increasing distances to the central section .

[0022] According to at least one embodiment of the electrical conductor, the central section is configured to provide the magnetic field within a region of interest being spaced apart from the central section . The magnetic field is a vector field being generated by electrically charged particles , i . e . the electrical current which is transmitted through the central section . In particular, the magnetic field is configured to interact with particles , e . g . at least one quantum particle such as an atom or an ion, which is within the region of interest . The magnetic field strength within the region of interest depends on a magnitude of the electrical current flowing through the central section and a distance from the central section . The magnetic field can be a static magnetic field or a dynamic magnetic field, i . e . an oscillating magnetic field, being dependent on the electrical current transmitted through the central section .

[0023] Exemplarily, the central section is configured to provide a predetermined electric potential within the region of interest being characteristic for the magnetic field . For example , the extended section does not provide a contribution to the magnetic field in the region of interest , i . e . the electric potential . Alternatively, the extended section provides a contribution to the magnetic field, wherein the contribution resulting from the extended section is at least one order of magnitude smaller than the contribution resulting from the central section .

[0024] For example , the extended section is configured to provide a further magnetic field within a further region of interest being spaced apart from the central section and being spaced apart from the region of interest .

[0025] For example , the electrical conductor is part of an ion trap . In an ion trap, the magnetic field, in particular the magnetic field strength and the magnetic field gradient , in the region of interest is configured to confine and manipulate at least one ion . Exemplarily, besides the electrical current being transmitted through the central section, dependent on the geometry of the central section, the electric potential , e . g . a predetermined trapping potential , can be generated in the region of interest being configured to trap at least one ion in the region of interest . Exemplarily, a geometry of at least one of the first side surface , the second side surface , the top surface and the bottom surface of the central section is predetermined dependent on the trapping potential to be generated .

[0026] It is an idea, inter alia, to provide the extended section to the central section in order to apply an ef ficient cooling to the central section . This is that such a central section can have an increased damage threshold in contrast to typical current carrying wires . In particular, the damage threshold indicates an amount of electrical current that can be safely carried without causing damage or failure due to ohmic heating .

[0027] Advantageously, with such an electrical conductor comprising the central section, the magnetic field being produced by the central section can be predetermined in particular precise and over a wide range of magnetic field strength values . In fact , larger electrical currents can be transmitted by the central section, in contrast to typical current carrying wires not having the extended section .

[0028] According to at least one embodiment of the electrical conductor, the central section is delimited along the main extension direction by the input interface and the output interface . This is that the central section extends along the main extension direction from the input interface to the output interface , in particular over the first length .

[0029] According to at least one embodiment of the electrical conductor, the extended section is arranged at a side surface of the central section, which side surface extends along the main extension direction . In particular, the side surface is the first side surface or the second side surface of the central section . Alternatively, the side surface is the circumferential surface of the central section .

[0030] The extended section is , for example , in direct and immediate contact to the side surface of the central section . Exemplarily, the extended section is thermally and / or electrically directly connected to the side surface of the central section . Due to the direct connection, heat can be dissipated away from the central segment to the extended section particularly well .

[0031] According to at least one embodiment of the electrical conductor, a cross-sectional area of the extended section is larger than a cross-sectional area of the central section . The cross-sectional area is in particular defined in lateral directions through the electrical conductor .

[0032] The extended section has a top surface and a bottom surface opposite the top surface . The top surface and the bottom surface are connected by a first side surface and a second side surface opposite the first side surface as well as a first face surface and a second face surface opposite the first face surface . The first face surface of the extended section faces the side surface of the central section, and is in particular in direct contact to the side surface of the central section . The second face surface of the extended section faces away from the side surface of the central section .

[0033] The top surface and the bottom surface of the extended section extend each have a main extension plane in lateral directions . The first side surface and the second side surface of the extended section as well as the first face surface and the second face surface the extended section each have a main extension plane in vertical direction . Exemplarily, directly neighboring surfaces are connected by edges . Each edge is , for example , rounded or angular .

[0034] The main extension planes of the first face surface and the second face surface of the extended section each extend parallel to the main extension direction of the central section . The main extension planes of the first side surface and the second side surface of the extended section each extend oblique or perpendicular to the main extension direction of the central section .

[0035] In particular, an area of at least one of the top surface and the bottom surface of the extended section is larger than an area of at least one of the top surface and the bottom surface of the central section . Exemplarily, the area of at least one of the top surface and the bottom surface of the extended section is at least 50 % or at least 100 % larger than the area of at least one of the top surface and the bottom surface of the central section .

[0036] Advantageously, by having such a large area of the extended section, an amount of ohmic heat produced in the central section can be dissipated away to the extended section to a comparatively large amount , compared to an extended section which is smaller in si ze than the central section .

[0037] Alternatively or additionally, the cross-sectional area is defined in vertical direction through the electrical conductor . In this case , the extended section has the increasing thickness .

[0038] According to at least one embodiment of the electrical conductor, the extended section regionally protrudes beyond the input interface and the output interface along the main extension direction . In particular, the extended section protrudes beyond the input interface and the output interface along the main extension direction in a distance to the central section . In this distance , the extended section has a further length, which is larger than the first length of the central section.

[0039] According to at least one embodiment of the electrical conductor, the extended section tapers towards the central section. For example, the further length of the extended section decreases dependent on the distance to the central section. This is that the further length of the extended section decreases, for example, for decreasing distances to the central section.

[0040] For example, the first side surface of the extended section facing the main extension direction, in particular the first interface, of the central section and the main extension direction of the central section have a first angle of less than 90°, exemplarily, at least 10° or at least 20° and / or at most 80° or at most 70°, e.g. approximately 45°. For example, the second side surface of the extended section facing the main extension direction, in particular the second interface, of the central section and the main extension direction of the central section have a second angle of less than 90°, exemplarily, at least 10° or at least 20° and / or at most 80° or at most 70°, e.g. approximately 45°. The first angle and the second angle can be equal to one another.

[0041] According to at least one embodiment of the electrical conductor, in a region where the extended section and the central section are directly adjacent to one another, the extended section does not protrude beyond the input interface and the output interface along the main extension direction. Exemplarily, the further length of the extended section is equal or smaller than the first length of the central section in the region where the extended section and the central section are directly adj acent to one another . The region where the extended section and the central section are directly adj acent to one another are an interface between the first side surface of the central section and the first face surface of the extended section .

[0042] This is that due to such a design the generation of the magnetic field in the region of interest by the central section is not noticeably disturbed and at the same time a thermal coupling of the extended section and the central section is achieved .

[0043] According to at least one embodiment of the electrical conductor, the extended section is formed integrally with the central section . For example , the central section and the extended section comprise or consist of the same materials . Exemplarily, the central section and the extended section are formed in one piece .

[0044] According to at least one embodiment , the electrical conductor comprises an input section arranged at the input interface . Exemplarily, the input section is an input feed for the central section .

[0045] According to at least one embodiment , the electrical conductor comprises an output section arranged at the output interface . Exemplarily, the output section is an output feed for the central section .

[0046] Both, the input section and the output section, each has a top surface and a bottom surface opposite the top surface . The top surface and the bottom surface of each the input section and the output section are connected by a first side surface and a second side surface opposite the first side surface as well as a first face surface and a second face surface opposite the first face surface .

[0047] The first face surface of the input section faces the input interface of the central section, and is in particular in direct contact to the input interface of the central section . The second face surface of the input section faces away from the input interface of the central section . The first face surface of the output section faces the output interface of the central section, and is in particular in direct contact to the output interface of the central section . The second face surface of the output section faces away from the output interface of the central section . For example , the second face surfaces of the input interface and the output interface are configured to be externally contacted .

[0048] The top surface and the bottom surface of each the input section and the output section each have a main extension plane in lateral directions . The first side surface and the second side surface of each the input section and the output section as well as the first face surface and the second face surface of each the input section and the output section each have a main extension plane in vertical direction .

[0049] Exemplarily, directly neighboring surfaces are connected by edges . Each edge is , for example , rounded or angular .

[0050] The first side surface of the input section is directly opposite the first side surface of the extended section . The first side surface of the output section is directly opposite the second side surface of the extended section . The main extension directions of the first side surfaces of each the input section and the output section extend obliquely to the main extension direction of the central segment . The main extension directions of the second side surfaces of each the input section and the output section extend parallel to the main extension direction of the central segment . In particular, the second side surfaces of each the input section and the output section terminate flush with the central section, in particular the second side surface of the central section .

[0051] With such input and output sections , the central section can be advantageously supplied with the electrical current in an ef ficient manner . Such input and output sections further increase a dissipation of heat away from the central section .

[0052] According to at least one embodiment of the electrical conductor, at least one of a cross-sectional area of the input section and a cross-sectional area of the output section is larger than the cross-sectional area of the central section . In particular, an area of at least one of the top surface and the bottom surface of at least one of the input section and the output section is larger than an area of at least one of the top surface and the bottom surface of the central section .

[0053] Exemplarily, at least one of the input section and the output section has a thickness in vertical direction, which thickness increases dependent on a distance to the central section . This is that the thickness of at least one of the input section and the output section increases , for example , for increasing distances to the central section .

[0054] Advantageously, with such comparatively large input and output sections , the heat can dissipated away from the central segment particularly efficient such that, in particular, the damage threshold is further increased.

[0055] According to at least one embodiment of the electrical conductor, the extended section is spaced apart from the input section and the output section. In particular, the first side surface of the input section and the first side surface of the extended section are spaced apart in lateral directions by a first gap. Further, the first side surface of the output section and the second side surface of the extended section are in particular spaced apart in lateral directions by a second gap.

[0056] For example, the first side surface of the input section facing the main extension direction of the central section and the main extension direction of the central section have a further first angle of less than 90°, exemplarily, at least 10° or at least 20° and / or at most 80° or at most 70°, e.g. approximately 45°. For example, the first side surface of the output section facing the main extension direction of the central section and the main extension direction of the central section have a further second angle of less than 90°, exemplarily, at least 10° or at least 20° and / or at most 80° or at most 70°, e.g. approximately 45°. The further first angle and the further second angle can be equal to one another .

[0057] If the further first angle and the first angle and / or the further second angle and the second angle are equal, the first gap and / or the second gap have a width which is equal in lateral directions. I f the further first angle and the first angle and / or the further second angle and the second angle are di f ferent from one another, the first gap and / or the second gap have a width which changes dependent on the distance to the central section . This is that the width of first gap and / or the second gap decreases , for example , by decreasing distances to the central section .

[0058] According to at least one embodiment of the electrical conductor, at least one of the input section and the output section are formed integrally with the central section . In particular, both the input section and the output section are formed integrally with the central section . Exemplarily, the central section, the extended section, the input section and the output section are formed in one piece .

[0059] According to at least one embodiment of the electrical conductor, the extended section and the central section are each formed of a metalli zation . In particular, the input section, the output section the extended section and the central section are each formed of a metalli zation .

[0060] The metalli zation is formed of , for example , a planar wire . In particular, the electrical conductor is formed of the planar wire . "Planar" means here and in the following that the planar wire comprises a length in lateral directions , a width in lateral directions and a thickness in vertical direction, wherein the thickness is at least two orders of magnitude smaller than the length .

[0061] The width of the planar wire , in particular the central section, extends perpendicular to the main extension direction of the central section and is , for example , at least 0 . 5 pm or at least 1 pm and / or at most 500 pm or at most 100 pm, e . g . approximately 20 pm .

[0062] The thickness of the planar wire , in particular the central section, the extended section, the input section and / or the output section, is , for example , at least 0 . 1 pm or at least 1 pm and / or at most 100 pm or at most 50 pm, e . g . approximately 5 pm .

[0063] According to at least one embodiment of the electrical conductor, the central section and the extended section are within a common plane . In particular, the input section, the output section, the extended section and the central section are within a common plane .

[0064] According to at least one embodiment of the electrical conductor, the central section and the extended section are curved . In particular, the input section, the output section the extended section and the central section are curved . For example , the extended section and the central section are wound around a virtual axis . In particular, the virtual axis extends parallel to the main extension direction of the central section . For example , the second face surface of the extended section is directly opposite to the second side surface of the central section . Exemplarily, there is a third gap between the second face surface of the extended section and the second side surface of the central section .

[0065] According to at least one embodiment of the electrical conductor, the central section and the extended section are angular . For example , the central section and the extended section are bent along a first virtual axis , which is in particular oblique or perpendicular to the main extension direction . The first virtual axis divides the central section and the extended section in a first part and a second part . The first part and the second part extend obliquely or perpendicular to one another .

[0066] Additionally, the central section and the extended section can be further bent along a second virtual axis , which is in particular oblique or perpendicular to the main extension direction . The first virtual axis and the second virtual axis divide the central section and the extended section in the first part , the second part and a third part . The second part is arranged between the first part and the third part . Main extension planes of the first part and the third part each extend obliquely or perpendicular to the second part . In particular, the main extension planes of the first part and the third part extend parallel to one another and are spaced apart in vertical direction by the second part .

[0067] According to at least one embodiment of the electrical conductor, the region of interest is configured to trap and / or manipulate at least one quantum particle . In particular, the region of interest is arranged directly neighboring to the central section . This is that advantageously, the at least one quantum particle can be controlled by such an electrical conductor particularly precisely .

[0068] For example , the central section has an ohmic resistance of at least 0 . 1 Q and at most 10 Q, e . g . approximately 1 Q . Further, the electric current to be transmitted through the central section is at least 1 A and at most 50 A, e . g . approximately 10 A. Furthermore , a method for producing the electrical conductor is speci fied, wherein the electrical conductor described herein above can be produced or is produced with the method . This is to say that the features concerning the electrical conductor are also applicable for the method and vice versa .

[0069] According to at least one embodiment of the method, a substrate is provided . Exemplarily, the substrate is formed of an electrically insulating material , i . e . having a comparatively low electrical conductivity compared to the central section . The substrate is , for example , a mechanically rigid substrate or a mechanically flexible substrate .

[0070] I f the substrate is mechanically flexible , it is supported during production with a temporal substrate being mechanically stable . I f the substrate is mechanically rigid, the substrate can comprise at least one of sapphire , silicon, aluminum nitride , glass . The substrate can be a printed circuit board or a substrate of an ion trap . The substrate is in particular configured to dissipate heat away from the electrical conductor advantageously well . Further, the substrate has in particular a comparatively low thermal expansion .

[0071] According to at least one embodiment of the method, a metalli zation layer is applied on the substrate . The metalli zation layer is applied, e . g . , by a physical vapor deposition, PVD, process or a chemical vapor deposition, CVD, process . According to at least one embodiment of the method, the metalli zation layer is structured to a central section and an extended section, which is arranged at the central section .

[0072] According to at least one embodiment of the method, the extended section extends away from a main extension direction of the central section, and a cross-sectional area of the extended section is larger than a cross-sectional area of the central section .

[0073] According to at least one embodiment of the method, the metalli zation layer is structured by a lithography process . The lithography process includes , inter alia, the use of a photoresist and an etching step .

[0074] In the following, the electrical conductor is explained in more detail with reference to exemplary embodiments and the associated Figures .

[0075] Figures 1 and 2 each show a plan view of the electrical conductor according to an exemplary embodiment .

[0076] Figures 3 and 4 each show a three dimensional view of the electrical conductor according to an exemplary embodiment .

[0077] Elements that are identical , similar or have the same ef fect are given the same reference signs in the Figures . The Figures and the proportions of the elements shown in the figures are not to be regarded as true to scale . Rather, individual elements may be shown exaggeratedly large for better representability and / or for better comprehensibility . The electrical conductor 1 according to the exemplary embodiment of Figure 1 comprises a central section 2 and an extended section 5 . The central section 2 is configured to transmit an electrical current marked with an arrow in the Figures , indicating a direction of the electrical current . The electrical current is in particular configured to generate a magnetic field, such that the central section 2 is configured to provide the magnetic field within a region of interest 6 being spaced apart from the central section 2 . The region of interest 6 is indicated by a dotted region in the Figures 1 and 2 .

[0078] The central section 2 is formed of a planar wire extending within a main extension plane along a main extension direction, wherein the main extension direction of the central section 2 corresponds to the arrow in the Figures .

[0079] Figures 1 and 2 are both top views on the electrical conductor 1 . This is that a top surface of the central section 2 and a top surface of the extended section 5 is shown .

[0080] A first side surface 7 and a second side surface 8 of the central section 2 extend both parallel to the main extension direction . The first side surface 7 and the second side surface 8 of the central section 2 extend between a first face surface 9 and a second face surface 10 of the central section 2 . The first face surface 9 and the second face surface 10 extend perpendicular to the main extension direction . The first face surface 9 is a first interface of the central section 2 and the second face surface 10 is a second interface of the central section 2 . In particular, the electric current is inputted through the input interface 3 and outputted through the output interface 4 .

[0081] A first face surface 9 and a second face surface 10 of the extended section 5 extend both parallel to the main extension direction . The first face surface 9 of the extended section 5 extends between the first face surface 9 and the second face surface 10 of the central section 2 . The first face surface 9 of the extended section 5 is in direct contact to the first side surface 7 of the central section 2 .

[0082] A first length along the main extension direction of the first side surface 7 of the central section 2 is larger than a further length of the first face surface 9 of the extended section 5 . Further, the first length of the first side surface 7 of the central section 2 is smaller than a further length of the second face surface 10 of the extended section 5 . In particular, the extended section 5 tapers towards the central section 2 .

[0083] This is that the extended section 5 extends away from the main extension direction of the central section 2 . The extended section 5 extends up to a distance perpendicular to the main extension direction of the central section 2 . The distance is , for example , at least 50 % larger than the first length of the central section 2 . In particular, an area of the top surface of the central section 2 is larger than an area of the top surface of the extended section 5 .

[0084] The central section 2 and the extended section 5 are formed in one piece . The electrical conductor 1 according to the exemplary embodiment of Figure 2 comprises additionally to the extended section 5 of Figure 1 an input section 11 and an output section 12 . An area of a top surface of the input section 11 and an area of a top surface of the output section 12 are each larger than the area of the top surface of the central section 2 .

[0085] A first side surface 7 of the input section 11 is directly opposite the first side surface 7 of the extended section 5 . A first side surface 7 of the output section 12 is directly opposite the second side surface 8 of the extended section 5 .

[0086] A second side surface 8 of the input section 11 and a second side surface 8 of the output section 12 each extend parallel to the main extension direction . The second side surfaces 8 of the input section 11 and the output section 12 terminate flush with the second side surface 8 of the central section 2 .

[0087] A first face surface 9 of the input section 11 faces the input interface 3 of the central section 2 , and is in direct contact to the input interface 3 of the central section 2 . The second face surface 10 of the input section 11 faces away from the input interface 3 of the central section 2 . A length of the first face surface 9 of the input section 11 is smaller than a length of the second face surface 10 of the input section 11 , wherein the lengths are oriented perpendicular to the main extension direction .

[0088] The first face surface 9 of the output section 12 faces the output interface 4 of the central section 2 , and is in direct contact to the output interface 4 of the central section 2 . The second face surface 10 of the output section 12 faces away from the output interface 4 of the central section 2 . A length of the first face surface 9 of the output section 12 is smaller than a length of the second face surface 10 of the output section 12 , wherein the lengths are oriented perpendicular to the main extension direction .

[0089] The first side surface 7 of the extended section 5 as well as the first side surface 7 of the input section 11 , both facing the main extension direction of the central section 2 , enclose an angle , in particular a first angle and a further first angle , respectively, with the main extension direction of the central section 2 of approximately 45 ° . Further, the first side surface 7 of the extended section 5 and the first side surface 7 of the input section 11 are spaced apart from one another by a first gap 13 .

[0090] The second side surface 8 of the extended section 5 as well as the first side surface 7 of the output section 12 , both facing the main extension direction of the central section 2 , enclose an angle , in particular a second angle and a further second angle , respectively, with the main extension direction of the central section 2 of approximately 45 ° . Further, the second side surface 8 of the extended section 5 and the first side surface 7 of the output section 12 are spaced apart from one another by a second gap 14 .

[0091] The angles to the main extension direction are depicted in Figure 2 as dashed lines .

[0092] The input section 11 , the central section 2 , the extended section 5 and the output section 12 are formed in one piece . Additionally, the input section 11 , the central section 2 , the extended section 5 and the output section 12 are all extending within a common plane . This is that the electrical conductor 1 extends within a single common plane .

[0093] In contrast to Figure 2 , the electrical conductor 1 according to Figure 3 is curved . For example , the electrical conductor 1 , in particular the input section 11 , the central section 2 , the extended section 5 and the output section 12 , are wound around a virtual axis 15 . The virtual axis 15 is depicted in Figure 3 as a dashed dotted line . This is that the electrical conductor 1 , in particular the input section 11 , the central section 2 , the extended section 5 and the output section 12 , is formed as an outer surface of a hollow cylinder . The virtual axis 15 is a central axis of the hollow cylinder .

[0094] The second face surface 10 of the extended section 5 is directly opposite the second side surface 8 of the central section 2 forming a third gap 16 .

[0095] In contrast to Figure 2 , the electrical conductor 1 according to Figure 4 is angular . The electrical conductor 1 is divided in three parts , a first part 17 , a second part 18 and a third part 19 by a first virtual axis 15 and a second virtual axis 15 . The first virtual axis 15 and the second virtual axis 15 are perpendicular to the main extension direction of the central section 2 . The first virtual axis 15 and the second virtual axis 15 are depicted as two dash dotted lines in Figure 4 .

[0096] The first virtual axis 15 and the second virtual axis 15 each extend through the central section 2 and the extended section 5 . The first part 17 and the third part 19 have both a main extension plane being parallel to one another . The second part 18 extends between the first part 17 and the second part 19 , wherein the second part 18 has a main extension plane being perpendicular to the main extension planes of the first part 17 and the third part 19 .

[0097] For example , the first part 17 is arranged on a top surface of a substrate , the second part 18 is arranged on a side surface of the substrate and the third part 19 is arranged on a bottom surface of the substrate . The substrate is in particular part of an ion trap .

[0098] The invention is not limited to the exemplary embodiments by their description . Rather, the invention encompasses any new feature as well as any combination of features , which in particular includes any combination of features in the claims , even i f this feature or combination itsel f is not explicitly indicated in the claims or exemplary embodiments .

[0099] Reference signs

[0100] 1 electrical conductor

[0101] 2 central section

[0102] 3 input interface

[0103] 4 output interface

[0104] 5 extended section

[0105] 6 region of interest

[0106] 7 first side surface

[0107] 8 second side surface

[0108] 9 first face surface

[0109] 10 second face surface

[0110] 11 input section

[0111] 12 output section

[0112] 13 first gap

[0113] 14 second gap

[0114] 15 virtual axis

[0115] 16 third gap

[0116] 17 first part

[0117] 18 second part

[0118] 19 third part

Claims

Claims1. Electrical conductor (1) for generating a magnetic field, comprising- a central section (2) having an input interface (3) and an output interface (4) , and- an extended section (5) arranged at the central section (2) between the input interface (3) and the output interface (4) , wherein- the extended section (5) extends away from a main extension direction of the central section (2) , and- the central section (2) is configured to provide the magnetic field within a region of interest (6) being spaced apart from the central section (2) .

2. Electrical conductor (1) according to claim 1, wherein- the central section (2) is configured to transmit electrical current from the input interface (3) to the output interface (4) , and- the extended section (5) is not configured to transmit electrical current from the input interface (3) to the output interface ( 4 ) .

3. Electrical conductor (1) according to one of the claims 1 or 2, wherein- the central section (2) is delimited along the main extension direction by the input interface (3) and the output interface (4) , and- the extended section (5) is arranged at a side surface of the central section (2) , which side surface extends along the main extension direction.

4. Electrical conductor (1) according to one of the claims 1 to 3, wherein- a cross-sectional area of the extended section (5) is larger than a cross-sectional area of the central section (2) .

5. Electrical conductor (1) according to one of the claims 1 to 4, wherein- the extended section (5) regionally protrudes beyond the input interface and the output interface along the main extension direction, and- the extended section (5) tapers towards the central section (2) .

6. Electrical conductor (1) according to one of the claims 1 to 5, wherein- in a region where the extended section (5) and the central section (2) are directly adjacent to one another, the extended section (5) does not protrude beyond the input interface (3) and the output interface (4) along the main extension direction.

7. Electrical conductor (1) according to one of the claims 1 to 6, wherein- the extended section (5) is formed integrally with the central section (2) .

8. Electrical conductor (1) according to one of the claims 1 to 7, further comprising- an input section (11) arranged at the input interface (3) , and- an output section (12) arranged at the output interface( 4 ) , wherein- at least one of a cross-sectional area of the input section (11) and a cross-sectional area of the output section (12) is larger than the cross-sectional area of the central section (2) .

9. Electrical conductor (1) according to one of the claims 7 or 8, wherein- the extended section (5) is spaced apart from the input section (11) and the output section (12) .

10. Electrical conductor (1) according to one of the claims 7 to 9, wherein- at least one of the input section (11) and the output section (12) are formed integrally with the central section (2) .

11. Electrical conductor (1) according to one of the claims 1 to 10, wherein- the extended section (5) and the central section (2) are each formed of a metallization.

12. Electrical conductor (1) according to one of the claims 1 to 11, wherein- the central section (2) and the extended section (5) are within a common plane.

13. Electrical conductor (1) according to one of the claims 1 to 12, wherein- the central section (2) and the extended section (5) are curved, and / or- the central section (2) and the extended section (5) are angular .

14. Electrical conductor (1) according to one of the claims 1 to 13, wherein- the region of interest (6) is configured to trap and / or manipulate at least one quantum particle.

15. Method for producing an electrical conductor (1) , with- providing a substrate,- applying a metallization layer on the substrate, and- structuring the metallization layer to a central section(2) and an extended section (5) , which is arranged at the central section (2) , wherein- the extended section (5) extends away from a main extension direction of the central section (2) , and- a cross-sectional area of the extended section (5) is larger than a cross-sectional area of the central section (2) .

16. Method for producing an electrical conductor (1) according to claim 15, wherein- the metallization layer is structured by a lithography process .

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