Single-atom manipulation system, control method and electronic device

Abstract

Embodiments of the present application disclose a single-atom manipulation system, a control method and an electronic device. The single-atom manipulation system comprises: an atomic cooling device configured to form an MOT atomic group, wherein the MOT atomic group is capable of generating atomic fluorescence of a first target wavelength; an atomic trapping device, wherein the atomic trapping device comprises a laser source and a strong focusing lens, the laser source emits a target laser beam of a second target wavelength, the target laser beam passes through the strong focusing lens to form an optical tweezer array to trap the MOT atomic group; and an imaging device, wherein the imaging device is sequentially provided with a filter, a noise fluorescence shielding device, a plano-convex lens and an imaging unit in a reflection direction of the focused atomic fluorescence, and the noise fluorescence shielding device is configured to shield noise fluorescence generated by the atomic cooling device.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of single atom manipulation system, more particularly, the present application relates to a single atom manipulation system, a control method and an electronic device. BACKGROUND

[0002] In neutral atom quantum computing, the number of qubits is a very important parameter. Generally, atoms are trapped by forming a two-dimensional optical tweezer array to obtain a number of qubits of hundreds or even more. The method for determining whether an atom is trapped in the optical tweezer is generally to collect the fluorescence signal of the atom in the optical tweezer through a strong focusing lens, and then the fluorescence signal is imaged by an EMCCD (Electron-Multiplying Charge Coupled Device) camera or an sCMOS (Scientific complementary metal-oxide semiconductor) camera or the like. In the imaging software, a plurality of bright spots arranged in an array can be seen, which are the atoms trapped in the optical tweezer array. However, there is often very bright background fluorescence noise on the imaging surface, which greatly interferes with the fluorescence signal of the atom, and in severe cases, it is difficult to distinguish whether it is an atom fluorescence signal or background noise, which will directly affect the measurement result. Therefore, how to reduce the background fluorescence noise during camera imaging and improve the signal contrast is a very important problem in reading the information of the qubit array. SUMMARY

[0003] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. The summary section of the present application does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor does it try to determine the protection scope of the claimed technical solution.

[0004] In order to reduce the background fluorescence noise during camera imaging and improve the signal contrast, in a first aspect, the present application provides a single atom manipulation system, comprising:

[0005] An atomic cooling device for forming an MOT atom group, wherein the MOT atom group can generate atomic fluorescence of a first target wavelength;

[0006] An atomic trapping device, wherein the atomic trapping device comprises a laser source and a strong focusing lens, and the second target wavelength of the target laser beam emitted by the laser source passes through the strong focusing lens to form an optical tweezer array to capture and trap the MOT atom group;

[0007] The imaging device sequentially comprises a filter, a noise fluorescence shielding device, a plano-convex lens and an imaging unit in the reflection direction of the strong focusing of the atomic fluorescence, and the noise fluorescence shielding device is used for shielding the noise fluorescence generated by the atomic cooling device.

[0008] Optionally, the noise fluorescence shielding device comprises an adjustable shielding wire, and the adjustable shielding wire is movable in the reflection direction of the strong focusing of the atomic fluorescence and a direction intersecting the reflection direction.

[0009] Optionally, the diameter of the adjustable shielding wire is less than or equal to 1 mm.

[0010] Optionally, the adjustable shielding wire is arranged on the focal plane of the strong focusing lens in the reflection direction of the strong focusing of the atomic fluorescence, and the adjustable shielding wire at least partially coincides with the focal point of the strong focusing lens.

[0011] Optionally, the filter can transmit the target laser beam of the second target wavelength, and the filter can reflect the atomic fluorescence of the first target wavelength.

[0012] Optionally, the atomic cooling device comprises a vacuum cavity (101), at least three pairs of cooling light sources and an anti-Helmholtz coil, the distance between the anti-Helmholtz coil and the center position of the vacuum cavity (101) is less than a first preset distance, the at least three pairs of cooling light sources emit cooling light beams of the first target wavelength, and the distance between the irradiation direction of the cooling light beams and the center position of the vacuum cavity (101) is less than a second preset distance.

[0013] Optionally, the laser source comprises an optical fiber and an optical fiber coupling frame, and the optical fiber is fixedly connected to the optical fiber coupling frame.

[0014] In a second aspect, the application further provides a single-atom manipulation system control method, which is used for the single-atom manipulation system of the first aspect and comprises the following steps.

[0015] Obtaining the optical parameter of the strong focusing lens;

[0016] Determining the focal plane position of the strong focusing lens according to the optical parameter;

[0017] Adjusting the first position of the noise fluorescence shielding device in the reflection direction of the strong focusing of the atomic fluorescence according to the focal plane position, so that the first position is close to the focal plane position.

[0018] Optionally, the fluorescence shielding device comprises an adjustable shielding wire.

[0019] The method further comprises the following steps.

[0020] controlling the adjustable barrier wire to move in a direction intersecting the reflection direction of the atomic fluorescence to change a second position of the adjustable barrier wire;

[0021] acquiring a fluorescence noise map at different second positions of the adjustable barrier wire;

[0022] extracting a noise intensity from the fluorescence noise map;

[0023] selecting a second position corresponding to the lowest noise intensity as an optimal position of the adjustable barrier wire.

[0024] In a third aspect, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor is configured to execute the computer program stored in the memory to implement the steps of the control method according to any one of the second aspect.

[0025] In summary, the single atom manipulation system provided by the embodiments of the present application includes an atomic cooling device configured to form an MOT atomic group, the MOT atomic group being capable of generating atomic fluorescence of a first target wavelength; an atomic trapping device, the atomic trapping device including a laser source and a strong focusing lens, a target laser beam of a second target wavelength emitted by the laser source passing through the strong focusing lens to form an optical tweezer array to trap the MOT atomic group; and an imaging device, the imaging device being sequentially provided with a filter, a noise fluorescence shielding device, a plano-convex lens, and an imaging unit in a reflection direction of the focused atomic fluorescence, the noise fluorescence shielding device being configured to shield noise fluorescence generated by the atomic cooling device. The single atom manipulation system provided by the embodiments of the present application can effectively shield the fluorescence noise generated by the cooling light source by additionally providing the noise fluorescence shielding device between the filter and the plano-convex lens, without causing a large impact on the intensity of the atomic fluorescence, so as to reduce the background fluorescence noise during imaging and improve the signal contrast, thereby effectively improving the calculation accuracy of the number of quantum bits.

[0026] The single atom manipulation system provided by the embodiments of the present application, other advantages, objects and features of the present application will be embodied in part by the following description, and part will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals are used throughout the same elements across various drawings. In the drawings:

[0028] Figure 1A principle schematic diagram of a single atom manipulation system provided by an embodiment of the present application;

[0029] Figure 2 A schematic diagram of atomic fluorescence imaging provided by an embodiment of the present application;

[0030] Figure 3 A principle schematic diagram of atomic fluorescence imaging provided by an embodiment of the present application;

[0031] Figure 4 A principle schematic diagram of noise fluorescence imaging provided by an embodiment of the present application;

[0032] Figure 5 A control method flowchart of a single atom manipulation system provided by an embodiment of the present application;

[0033] Figure 6 An electronic device structure schematic diagram provided by an embodiment of the present application;

[0034] Figure 1 Corresponding relationship between names and labels of various components is as follows:

[0035] 1000-single atom manipulation system; 100-atomic cooling device; 101-vacuum cavity; 102-cooling light source; 103-anti-Helmholtz coil; 200-atomic trapping device; 201-laser source; 202-strong focusing lens; 300-imaging device; 301-filter; 302-noise fluorescence shielding device; 303-plano-convex lens; 304-imaging unit. DETAILED DESCRIPTION

[0036] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application and above-mentioned accompanying drawings (if any) are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in other than the order illustrated or described herein. In addition, the terms "comprise" and "have" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0037] The present application provides a single atom manipulation system 1000, please refer to Figure 1A principle schematic diagram of a single-atom manipulation system provided by an embodiment of the present application can specifically include:

[0038] An atomic cooling device 100 for forming an MOT atomic group capable of generating atomic fluorescence of a first target wavelength;

[0039] An atomic trapping device 200 including a laser source 201 and a strong focusing lens 202, the laser source 201 emitting a target laser beam of a second target wavelength to form an optical tweezer array through the strong focusing lens 202 to trap the MOT atomic group;

[0040] An imaging device 300 sequentially provided with a filter 301, a noise fluorescence shielding device 302, a plano-convex lens 303 and an imaging unit 304 in a reflection direction of the focused atomic fluorescence, the noise fluorescence shielding device 302 for shielding noise fluorescence generated by the atomic cooling device 100.

[0041] For example, the first target wavelength and the second target wavelength are determined by the type of trapped atoms. In the case of trapping rubidium atoms, the first target wavelength is 780 nm and the second target wavelength is 830 nm. First, the atomic cooling device 100 cools the rubidium atoms in the vacuum cavity 101 to form a low-temperature MOT (Magneto-optical Trap) atomic group. Then, an optical tweezer array is formed by using 830 nm laser to trap and capture atoms in the cold atomic group. In order to ensure that the optical tweezer can trap the MOT atomic group, the focal point of the optical tweezer needs to be coincided with the MOT atomic group. The optical tweezer is generated by the atomic trapping device 200, the laser source 201 emits a target laser beam of the second target wavelength, the target laser beam is focused by the strong focusing lens 202 to form an optical tweezer, and the focal point of the optical tweezer is ensured to be coincided with the MOT atomic group. After the optical tweezer traps a single atom, the cooling light source 102 (MOT light beam) in the atomic cooling device 100 is turned on to irradiate the rubidium atom in the optical tweezer. As shown in FIG. 4, the rubidium atom will emit atomic fluorescence of the 780 nm wavelength band, and part of the atomic fluorescence will be collected by the strong focusing lens 202. Since the atom is at the focal point of the strong focusing lens 202, the atomic fluorescence emitted by the atom is nearly collimated after passing through the strong focusing lens 202. The images of the atomic fluorescence and the fluorescence background noise are as shown in FIG. 5. Figure 3 Figure 2 ​As shown, the bright dots represent the atomic array, and the surrounding diffuse large spots are background fluorescence noise. The collimated atomic fluorescence is reflected by the filter 301, passes through the noise fluorescence shielding device 302, which shields the noise fluorescence. After effective shielding, the intensity of the atomic fluorescence is reduced by less than 1%. The atomic fluorescence passes through the plano-convex lens 303 and is imaged in the imaging unit 304. The imaging unit 304 can be a CCD (Charge Coupled Device) camera. The plano-convex lens 303 and the strong focusing lens 202 combine to form an imaging system with a certain magnification, which is used to image the atomic fluorescence.

[0042] In summary, the method provided by the embodiment of the present application can effectively shield the fluorescence noise formed by the cooling light source 102 by adding the noise fluorescence shielding device 302 between the filter 301 and the plano-convex lens 303, without causing a large impact on the intensity of the atomic fluorescence. Therefore, the background fluorescence noise during imaging can be reduced, the signal contrast can be improved, and the calculation accuracy of the number of quantum bits can be effectively improved.

[0043] In some examples, the noise fluorescence shielding device includes an adjustable shielding wire, which can move in the reflection direction of the strong focusing of the atomic fluorescence and the direction intersecting the reflection direction.

[0044] For example, the noise fluorescence is derived from the cooling light source 102 (MOT beam) in the atomic cooling device 100. Because the MOT beam is turned on when the atomic fluorescence is excited, the MOT beam undergoes multiple reflections when passing through the outer and inner surfaces of the vacuum chamber, causing part of the beam to be coupled into the strong focusing lens and then enter the imaging unit 304 along the atomic fluorescence path, forming background fluorescence noise. In addition, the wavelength of the MOT beam is the same as that of the atomic fluorescence, which is 780 nm, so it is impossible to distinguish the atomic fluorescence and the MOT beam by the filter 301. However, the MOT beam and the atomic fluorescence have a major difference. The MOT beam is a collimated beam before entering the strong focusing lens 202 after multiple reflections, and the collimated beam is focused after passing through the strong focusing lens 202, with the focal point being on the back focal plane of the strong focusing lens 202. The atomic fluorescence is a divergent point source, and the divergent beam is collimated after entering the strong focusing lens 202. The focusing, collimation, and other propagation processes of the MOT beam and the atomic fluorescence beam are as follows: Figure 3 and Figure 4The MOT light beam is focused on the back focal plane of the strong focusing lens 202, and the light spot diameter at the focal point is less than 1 mm. A 1-mm-diameter blocking wire is used to intercept the focal point of the MOT light beam. The blocking wire is movable forward and backward and left and right. The position of the back focal plane is found by moving the blocking wire forward and backward, and the focal point of the MOT light beam is made to fall on the blocking wire by moving the blocking wire left and right. The blocking wire is installed on an optical base, and the base can move forward and backward and left and right. In this way, the intensity of the MOT light beam is reduced by almost 100%. By this method, the fluorescent background noise caused by the MOT light beam can be almost completely eliminated, and the contrast of the atomic fluorescence signal is increased from 2:1 to 5:1, which greatly reduces the error rate in judging the atomic state.

[0045] In summary, the single-atom manipulation system provided in the embodiments of the present application can effectively eliminate fluorescent noise and improve the accuracy of atomic bit number calculation by setting an adjustable blocking wire that can move in the reflection direction of the strong focusing of the atomic fluorescence and the direction intersecting the reflection direction, and adjusting the position of the focal point of the blocked MOT light beam after focusing.

[0046] In some examples, the diameter of the adjustable blocking wire is less than or equal to 1 mm.

[0047] For example, the MOT light beam is focused on the back focal plane of the strong focusing lens 202, and the light spot diameter at the focal point is less than 1 mm. In order to effectively block the influence of the MOT light beam and not block the rest of the atomic fluorescence, the diameter of the adjustable blocking wire is set to be less than or equal to 1 mm.

[0048] In some examples, the adjustable blocking wire is arranged on the focal plane in the reflection direction of the strong focusing of the atomic fluorescence of the strong focusing lens 202, and the adjustable blocking wire at least partially overlaps the focal point of the strong focusing lens 202.

[0049] For example, the adjustable blocking wire is arranged on the focal plane corresponding to the strong focusing lens 202, and the adjustable blocking wire and the focal point are arranged to at least partially overlap, which can effectively block the noise fluorescence after refocusing, thereby avoiding the fluorescence from entering the imaging unit 304 and affecting the quantum number calculation.

[0050] In some examples, the filter 301 can transmit the target laser beam of the second target wavelength, and the filter 301 can reflect the atomic fluorescence of the first target wavelength.

[0051] For example, the filter 301 can transmit the target laser beam of the second target wavelength to ensure that the target laser can capture the MOT atom group, and the filter 301 can reflect the atom fluorescence of the first target wavelength, so that the atom fluorescence is reflected by the filter 301 and effectively enters the imaging unit 304 to take the atom fluorescence and accurately calculate the number of qubits.

[0052] In some examples, the atom cooling device 100 includes a vacuum cavity 101, at least three pairs of cooling light sources 102, and a anti-Helmholtz coil 103, the anti-Helmholtz coil 103 is located at a center position of the vacuum cavity 101 and has a distance less than a first preset distance, and the at least three pairs of cooling light sources 102 emit cooling light beams of the first target wavelength, and the irradiation direction of the cooling light beams has a distance less than a second preset distance from the center position of the vacuum cavity 101.

[0053] For example, the atom cooling device 100 includes a vacuum cavity 101 capable of being vacuumized, and at least three pairs of cooling light sources 102 and an anti-Helmholtz coil 103. The three pairs of cooling light sources emit first target wavelength laser beams that propagate towards each other, and the laser beams cause the atoms to slow down to form an optical molasses under the radiation pressure along the propagation direction of the laser beams. The anti-Helmholtz coil 103 forms a gradient magnetic field that is zero at the center position of the coil and increases away from the center position. Under the action of the gradient magnetic field, the atomic energy level is split by the Zeeman effect, and the atom is subjected to a force always pointing to the center of the magnetic field in combination with the action of the laser beam. Therefore, the atoms in the vacuum cavity are slowed down and gathered at the center position of the magnetic field to form a low-temperature cold atom group, i.e., a MOT atom group. The cooling light beams are irradiated to the center position of the vacuum cavity, i.e., the irradiation direction of the cooling light beams has a distance less than a second preset distance from the center position of the vacuum cavity 101, and the anti-Helmholtz coil 103 is arranged at the center position of the vacuum cavity, i.e., the anti-Helmholtz coil 103 has a distance less than a first preset distance from the center position of the vacuum cavity 101.

[0054] In some examples, the laser source 201 includes an optical fiber and an optical fiber coupling frame, and the optical fiber is fixedly connected to the optical fiber coupling frame.

[0055] For example, the laser source 201 can include an optical fiber and an optical fiber coupling frame, the laser of the second target wavelength is transmitted to the optical fiber coupling frame through the optical fiber, the optical fiber coupling frame adjusts the light emitted by the optical fiber to be collimated, and the laser is transmitted from the optical fiber to the free space.

[0056] Referring to Figure 5 The application also provides a single-atom manipulation system control method, which includes the following steps.

[0057] S510, obtaining the optical parameters of the strong focusing lens;

[0058] Exemplarily, different strong focusing lenses correspond to different optical parameters, which can be obtained by product specifications of the strong focusing lenses or by optical property measurement.

[0059] S520, determining the focal plane position of the strong focusing lens according to the optical parameters;

[0060] Exemplarily, the focal plane position of the strong focusing lens can be calculated according to the optical parameters. That is, the distance between the focal plane position and the end face of the strong focusing lens.

[0061] S530, adjusting the first position of the noise fluorescence shielding device in the reflection direction of the strong focusing of the atomic fluorescence according to the focal plane position, so that the first position is close to the focal plane position.

[0062] Exemplarily, the first position of the noise fluorescence shielding device in the reflection direction after strong focusing is adjusted according to the position of the focal plane. The reflection direction is the direction of the reflected light through the filter and then entering the imaging unit 304. The position of the fluorescence shielding device is adjusted to be close to the focal plane position, so that the noise fluorescence shielding device can effectively shield the noise fluorescence at the focal point position of the refocusing of the fluorescence noise, and the calculation accuracy of the number of atomic bits is improved.

[0063] In summary, the single atom manipulation system control method provided by the embodiment of the application can effectively shield the noise fluorescence at the focal point position of the refocusing of the fluorescence noise by adjusting the noise shielding device to be close to the focal plane position, thereby improving the calculation accuracy of the number of atomic bits.

[0064] In some examples, the fluorescence shielding device includes an adjustable shielding wire.

[0065] The method further includes:

[0066] controlling the adjustable shielding wire to move in a direction intersecting the reflection direction, so as to change a second position of the adjustable shielding wire;

[0067] obtaining fluorescence noise maps under different second positions of the adjustable shielding wire;

[0068] extracting noise intensity according to the fluorescence noise maps;

[0069] selecting the second position corresponding to the lowest noise intensity as the optimal position of the adjustable shielding wire.

[0070] Exemplarily, when the fluorescence shielding device is the adjustable shielding wire, the device has been close to the coincidence with the focal plane in the first position, but the shielding wire does not necessarily pass through the focal point position corresponding to the strong focusing lens, that is, the shielding wire does not necessarily pass through the focal point position of the focused noise fluorescence, by continuously adjusting the second position of the adjustable shielding wire in the reflection direction intersecting direction, and acquiring the fluorescence noise diagram under different second positions, when the noise intensity is the lowest, the shielding wire is effectively coincided with the focal point, at this time, the shielding effect of the adjustable shielding wire on the fluorescence noise is the best, and the second position at this time is the best position of the adjustable shielding wire.

[0071] In summary, the single atom manipulation system control method provided in the embodiments of the present application can effectively shield the noise fluorescence by continuously adjusting the second position and acquiring the corresponding noise intensity, and taking the second position corresponding to the lowest noise intensity as the best position of the adjustable shielding wire, thereby improving the accuracy of the calculation result of the number of atomic bits.

[0072] As shown in Figure 6 The embodiments of the present application also provide an electronic device 600, which comprises a memory 610, a processor 620, and a computer program 611 stored in the memory 620 and capable of running on the processor, and the processor 620 implements the steps of any method of remote communication when executing the computer program 611.

[0073] Since the electronic device introduced in the embodiments is the device used in the single atom manipulation system control device in the embodiments of the present application, the specific implementation mode of the electronic device in the embodiments and various changes thereof can be understood by those skilled in the art based on the method introduced in the embodiments of the present application, so that how the electronic device implements the method in the embodiments of the present application is not introduced in detail here, as long as the device used by those skilled in the art to implement the method in the embodiments of the present application belongs to the scope of the present application.

[0074] In the specific implementation process, the computer program 611 can implement Figure 5 Any embodiment in the corresponding embodiments comprises:

[0075] The optical parameters of the strong focusing lens are acquired;

[0076] Exemplarily, different strong focusing lenses correspond to different optical parameters, and the optical parameters can be acquired through the product specifications of the strong focusing lens, or can be acquired through optical property measurement.

[0077] The focal plane position of the strong focusing lens is determined according to the optical parameters;

[0078] Exemplarily, the focal plane position of the strong focusing lens can be calculated according to the optical parameters. That is, the distance between the position of the focal plane and the end face of the strong focusing lens.

[0079] According to the position of the focal plane, the first position of the noise fluorescence shielding device in the reflection direction after strong focusing is adjusted to be close to the position of the focal plane.

[0080] For example, according to the position of the focal plane, the first position of the noise fluorescence shielding device in the reflection direction after strong focusing is adjusted to be close to the position of the focal plane. The reflection direction is the direction of the light reflected by the filter and then entering the imaging unit 304. The position of the fluorescence shielding device is adjusted to be close to the position of the focal plane, so that the noise fluorescence shielding device can effectively shield the noise fluorescence at the focal point position of the refocusing of the noise fluorescence, thereby improving the calculation accuracy of the number of atomic bits.

[0081] In summary, the single atom manipulation system control method provided in the embodiments of the present application can adjust the noise shielding device to be close to the position of the focal plane, so that the noise fluorescence shielding device can effectively shield the noise fluorescence at the focal point position of the refocusing of the noise fluorescence, thereby improving the calculation accuracy of the number of atomic bits.

[0082] In a possible implementation, the fluorescence shielding device includes an adjustable shielding wire.

[0083] The method further includes:

[0084] The adjustable shielding wire is controlled to move in a direction intersecting the reflection direction, so as to change a second position of the adjustable shielding wire.

[0085] A fluorescence noise map under different second positions of the adjustable shielding wire is obtained.

[0086] The noise intensity is extracted according to the fluorescence noise map.

[0087] The second position corresponding to the lowest noise intensity is selected as the optimal position of the adjustable shielding wire.

[0088] For example, when the fluorescence shielding device is an adjustable shielding wire, the device has already been close to the position of the focal plane at the first position, but the shielding wire does not necessarily pass through the focal point position corresponding to the strong focusing lens, that is, the shielding wire does not necessarily pass through the focal point position of the noise fluorescence after focusing. By continuously adjusting the second position of the adjustable shielding wire in the direction intersecting the reflection direction, and obtaining the fluorescence noise map under different second positions, when the noise intensity is the lowest, the shielding wire is effectively coincided with the focal point, and the shielding effect of the adjustable shielding wire on the fluorescence noise is the best at this time. The second position at this time is the optimal position of the adjustable shielding wire.

[0089] In conclusion, the single-atom manipulation system control method provided in the embodiments of the present application can effectively shield the noise fluorescence by continuously adjusting the second position and obtaining the corresponding noise intensity, and taking the second position corresponding to the lowest noise intensity as the optimal position of the adjustable barrier wire, thereby improving the accuracy of the calculation result of the atomic bit number.

[0090] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0091] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0092] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices produce a device that implements the flow Figure 1 The function specified in one or more flows and / or blocks. Figure 1 The means for performing the function specified in one or more flows and / or blocks.

[0093] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction means, which implements the flow Figure 1 The function specified in one or more flows and / or blocks. Figure 1 The means for performing the function specified in one or more flows and / or blocks.

[0094] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide a process for implementing the flow Figure 1 The function specified in one or more flows and / or blocks. Figure 1the steps of the function specified in the one or more blocks.

[0095] The embodiments of the present application further provide a computer program product, which comprises computer software instructions, when the computer software instructions are run on a processing device, cause the processing device to execute the flow or function according to the embodiments of the present application. Figure 5 The flow of the control method in the corresponding embodiment.

[0096] The computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the flow or function according to the embodiments of the present application is generated wholly or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be stored by the computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, DVD), or semiconductor media (for example, solid state disk (SSD)) and the like.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0098] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0099] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0100] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0101] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various program code storage media.

[0102] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

Claims

1. A single atom manipulation system, characterized by, include: An atomic cooling device for forming MOT atomic clusters, which are capable of producing atomic fluorescence at a first target wavelength; An atomic trapping device, comprising a laser source and a high-focusing lens, wherein a target laser beam of a second target wavelength emitted by the laser source passes through the high-focusing lens to form an optical tweezers array to capture and trap the MOT atomic cluster; An imaging device, wherein a filter, a noise fluorescence blocking device, a plano-convex lens and an imaging unit are sequentially arranged in the reflection direction after the atomic fluorescence is strongly focused; the noise fluorescence blocking device is used to block the noise fluorescence generated by the atomic cooling device. The noise fluorescence blocking device includes an adjustable baffle wire, which can move along the reflection direction of the atomic fluorescence after strong focusing and in a direction intersecting the reflection direction; The adjustable baffle is disposed on the focal plane of the strong focusing lens in the direction of reflection of the atomic fluorescence after strong focusing, and the adjustable baffle at least partially coincides with the focal point of the strong focusing lens.

2. The single atom manipulation system of claim 1, wherein, The diameter of the adjustable stop wire is less than or equal to 1 mm.

3. The single atom manipulation system of claim 1, wherein, The filter can transmit the target laser beam of the second target wavelength, and the filter can reflect the atomic fluorescence of the first target wavelength.

4. The single atom manipulation system of claim 1, wherein, The atomic cooling device includes a vacuum chamber, at least three pairs of cooling light sources and an anti-Helmholtz coil. The distance between the anti-Helmholtz coil and the center of the vacuum chamber is less than a first preset distance. The at least three pairs of cooling light sources emit cooling beams of the first target wavelength. The distance between the irradiation direction of the cooling beam and the center of the vacuum chamber is less than a second preset distance.

5. The single atom manipulation system of claim 1, wherein, The laser source includes an optical fiber and an optical fiber coupling frame, with the optical fiber fixedly connected to the optical fiber coupling frame.

6. A method for controlling a single atom manipulation system as claimed in any one of claims 1 to 5, wherein include: Obtain the optical parameters of the highly focusing lens; The focal plane position of the high-focusing lens is determined based on the optical parameters. The noise fluorescence blocking device is adjusted to a first position in the reflection direction of the atomic fluorescence after strong focusing, based on the focal plane position, so that the first position is close to the focal plane position. The fluorescent blocking device includes an adjustable baffle wire; The method further includes: The adjustable baffle wire is controlled to move in the direction of intersection with the reflection direction to change the second position of the adjustable baffle wire; Obtain fluorescence noise maps at different second positions; The noise intensity is extracted based on the fluorescence noise map; The second position corresponding to the lowest noise intensity is selected as the optimal position of the adjustable stop wire.

7. An electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program stored in the memory, implements the steps of the single-atom manipulation system control method as described in claim 6.

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