Diamond NV center-based educational quantum experiment device

Abstract

The present invention relates to a diamond NV center-based educational quantum experiment device. The device may include: a main body having an upper housing and a lower housing; an optical experiment unit which is installed in the upper housing and by which a diamond NV center-based quantum experiment is performed; and an electronic control unit which is installed in the lower housing and controls the diamond NV center-based quantum experiment performed by the optical experiment unit, wherein multiple optical experiment components constituting the optical experiment unit are detachably installed in the upper housing and are installed such that the installation positions thereof are changeable. Through this, a quantum basic experiment is possible even without a low-temperature device or a large experimental space by using the diamond nitrogen vacancy as the qubit.

Description

Diamond NV Center-based Educational Quantum Experiment Device

[0001] The present invention relates to an educational quantum experiment device, and more specifically, to an educational quantum experiment device based on a diamond NV center.

[0002] A diamond nitrogen vacancy center (NV center) is an atomic-sized point defect consisting of a vacancy at an adjacent lattice point that replaces a carbon atom in the crystal lattice of the diamond crystal.

[0003] The electron spin energy levels at the center of the nitrogen vacancies in diamond respond sensitively to changes in various physical quantities, including external magnetic fields, and their state can be initialized and read using a laser. Furthermore, due to the excellent physical properties of diamond, such quantum mechanical characteristics are stably maintained over a wide temperature range, including room temperature.

[0004] More specifically, the diamond nitrogen void possesses an electron spin with a spin number (S) of 1, allowing spin quanta to exist in three spin states (ms): +1, 0, and -1. When no external magnetic field is present along the axis of the diamond nitrogen void, the spin quanta of the +1 and -1 spin states (ms) are superimposed and exist at similar energy levels. However, when an external magnetic field is present along the axis of the diamond nitrogen void, the superposition of the spin quanta of the +1 and -1 spin states (ms) disappears due to the Zeeman effect, causing them to exist at different energy levels. Consequently, the nitrogen void spin quanta possess two resonance frequencies corresponding to spin transitions between the spin state (ms=0) and the spin state (ms=+1), or between the spin state (ms=0) and the spin state (ms=-1). The difference between these two resonance frequencies is proportional to the magnitude of the external magnetic field.

[0005] Recently, various companies have been jumping into the development of quantum platforms, and as national support for quantum research expands both domestically and internationally, interest in quantum technology is also rising.

[0006] However, since quantum technology often remains at the laboratory level, the methods available to interested learners to access and study it are currently limited to coding-based simulations.

[0007] Accordingly, the present invention was devised to resolve the above-mentioned problems, and aims to provide an educational quantum experiment device based on a diamond NV center that enables basic quantum experiments even without a low-temperature device or a large experimental space by using a diamond nitrogen pore as a qubit.

[0008] In addition, another objective of the present invention is to provide a diamond NV-centered educational quantum experiment device that can more easily perform various types of diamond NV-centered quantum experiments, including basic qubit experiments.

[0009] The above objective is achieved according to the present invention by a diamond NV center-based educational quantum experiment device comprising: a main body having an upper housing and a lower housing; an optical experiment unit installed inside the upper housing for performing a diamond NV center-based quantum experiment; and an electronic control unit installed inside the lower housing for controlling the diamond NV center-based quantum experiment by the optical experiment unit; wherein a plurality of optical experiment components constituting the optical experiment unit are detachably installed inside the upper housing, and are installed in such a way that their installation positions can be changed.

[0010] Here, the upper housing may include a base plate forming a bottom surface and a plurality of fastening holes arranged in a matrix form spaced apart from each other on the base plate and formed penetratingly in the upper and lower directions on the base plate, through which each of the optical experimental components is fastened by bolt connection.

[0011] In addition, the installation position of each of the above-mentioned optical experimental components may be changed according to the position of the combined fastening hole among the plurality of above-mentioned fastening holes.

[0012] In addition, the plurality of optical experimental components may be divided into a fixed component group that is fixed regardless of the type of the diamond NV center-based quantum experiment; and a variable component group that is replaced according to the type of the diamond NV center-based quantum experiment.

[0013] Here, the fixed component group may include a diamond crystal, a microwave antenna for irradiating microwaves onto the diamond crystal, an external magnetic field source for applying a magnetic field to the diamond crystal, a fiber optic port for irradiating a laser, an acousto-optic modulator (AOM) for converting the laser irradiated from the fiber optic port into a laser pulse, and a photodetector for detecting a fluorescence signal emitted from the diamond crystal by the laser pulse emitted from the acousto-optic modulator.

[0014] And, the above variable component group can be replaced or optionally installed depending on the type of the diamond NV center-based quantum experiment.

[0015] For example, the above diamond NV-centered quantum experiment may include at least one of a basic qubit experiment, an external magnetic field sensing experiment in which a Helmholtz coil for applying a DC magnetic field and an AC magnetic field to the diamond crystal is additionally installed in the basic qubit experiment setup as a variable component group, a temperature sensing experiment in which a temperature control kit for controlling the temperature of the diamond crystal is additionally installed in the basic qubit experiment setup as a variable component group, and an external electric field sensing experiment in which a Helmholtz coil for applying a DC magnetic field and an AC magnetic field to the diamond crystal and an electrode for applying an electric field are additionally installed in the basic qubit experiment setup as a variable component group.

[0016] According to the above configuration, the present invention provides an educational quantum experiment device based on a diamond NV center that enables basic quantum experiments even without a low-temperature device or a large experimental space, by using a diamond nitrogen void as a qubit.

[0017] In addition, according to the present invention, a diamond NV center-based educational quantum experiment device is provided that can more easily perform various types of diamond NV center-based quantum experiments, including basic qubit experiments.

[0018] FIG. 1 is a perspective view of an educational quantum experiment device based on a diamond NV center, and

[0019] FIG. 2 is a diagram showing an example of the configuration of an electronic control unit of a diamond NV-centered educational quantum experiment device according to an embodiment of the present invention, and

[0020] FIG. 3 is a diagram showing an example of the setup of an optical experimental unit for a basic qubit experiment in a diamond NV-centered educational quantum experiment device according to an embodiment of the present invention, and

[0021] FIG. 4 is a diagram illustrating an example of a method for combining optical experiment components in an optical experiment section of a diamond NV-centered educational quantum experiment device according to an embodiment of the present invention, and

[0022] FIG. 5 is a diagram showing an example of the setup of an optical experimental unit for an external magnetic field sensing experiment in a diamond NV-centered educational quantum experiment device according to an embodiment of the present invention, and

[0023] FIG. 6 is a diagram showing an example of the setup of an optical experimental unit for a temperature sensing experiment in a diamond NV-centered educational quantum experimental device according to an embodiment of the present invention, and

[0024] FIG. 7 is a diagram showing an example of the setup of an optical experimental unit for an external electric field sensing experiment in a diamond NV-centered educational quantum experiment device according to an embodiment of the present invention.

[0025] The present invention relates to a diamond NV center-based educational quantum experiment device, comprising a main body having an upper housing and a lower housing, an optical experiment unit installed inside the upper housing where a diamond NV center-based quantum experiment is performed, and an electronic control unit installed inside the lower housing to control the diamond NV center-based quantum experiment by the optical experiment unit; wherein a plurality of optical experiment components constituting the optical experiment unit are detachably installed inside the upper housing, and are installed in such a way that their installation positions can be changed.

[0026] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention, and the present invention is defined only by the scope of the claims.

[0027] The terms used in this specification are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The terms "comprises" and / or "comprising" used in this specification do not exclude the presence or addition of one or more other components in addition to the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and "and / or" includes each of the mentioned components and all combinations of one or more. Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical scope of the invention.

[0028] Unless otherwise defined, all terms used herein (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0029] FIG. 1 is a perspective view of a diamond NV center-based educational quantum experiment device (10).

[0030] Referring to FIG. 1, the diamond NV center-based educational quantum experiment device (10) according to an embodiment of the present invention may be configured to include a main body (100).

[0031] The main body (100) according to an embodiment of the present invention may be configured to include an upper housing (110) and a lower housing (120). In one embodiment, the upper housing (110) and the lower housing (120) may each be formed in a structure in which independent boxes are interconnected.

[0032] Here, an optical experiment unit (300) to be described later may be installed inside the upper housing (110), and an electronic control unit (200) to be described later may be installed inside the lower housing (120).

[0033] In one embodiment, the upper housing (110) may include an openable / closeable cap (111). Here, the openable / closeable cap (111) may be made of a transparent or translucent material, thereby allowing the experimenter to check the state of the optical experiment unit (300) installed inside the upper housing (110) from the outside.

[0034] In an embodiment of the present invention, the opening / closing cap (111) is provided with a translucent orange material. Through this, the experimenter can visually identify the green laser irradiated inside the upper housing (110), while preventing damage to the experimenter's eyesight caused by the green laser.

[0035] Meanwhile, a plurality of buttons for operating the electronic control unit (200) may be provided on the exterior of the lower housing (120). For example, the buttons may include a power button (121) for turning the entire power of the educational quantum experiment device (10) on / off, and a laser button (122) for turning the output of the laser pulse on / off, which will be described later.

[0036] Additionally, the lower housing (120) may include a display unit (123). The display unit (123) may be exposed to the outside of the lower housing (120) to provide various information. In one embodiment, the display unit (123) displays various information when an experiment is being conducted, such that the operating status can be identified by displaying the name of the type of experiment currently in operation or the frequency and intensity of the microwave coming from the microwave signal generator (230) described later.

[0037] FIG. 2 is a diagram showing an example of the configuration of an electronic control unit (200) of a diamond NV-centered educational quantum experiment device (10) according to an embodiment of the present invention.

[0038] Referring to FIG. 2, an electronic control unit (200) according to an embodiment of the present invention may include a pulse generator (210). The pulse generator (210) outputs a pulse signal synchronized in each channel (①, ②, ③, ④) according to user operation. Here, the pulse signal output from the pulse generator (210) is applied to synchronize the operation of each component of the electronic control unit (200).

[0039] An electronic control unit (200) according to an embodiment of the present invention may include a laser module (220). Here, the laser module (220) may irradiate a laser of various wavelengths. For example, the laser module (220) may irradiate a laser of 532 nm.

[0040] An electronic control unit (200) according to an embodiment of the present invention may include an AOM driver (240). Here, the AOM driver (240) can control the acousto-optic modulator (320) (AOM: Acousto-Optic Modulator) to generate a laser pulse by adjusting a drive signal applied to the acousto-optic modulator (320) (AOM: Acousto-Optic Modulator) according to a pulse signal received from a pulse generator (210).

[0041] An electronic control unit (200) according to an embodiment of the present invention may be configured to include a microwave signal generator (230), a signal amplifier (231), and a signal switch (232).

[0042] A microwave signal generator (230) outputs microwaves that manipulate the spin qubit state of the diamond NV center. Here, the microwaves output from the microwave signal generator (230) are amplified through a signal amplifier (231).

[0043] And, the signal switch (232) switches microwaves between the microwave signal generator (230) and the signal amplifier (231), and generates microwave pulses by switching the microwaves flowing into the signal amplifier (231) on and off in synchronization with the pulse signal output from the pulse generator (210).

[0044] Here, the microwave pulse is transmitted through a wire to the microwave antenna (351) to be described later, which is installed in the optical experiment unit (300), and the microwave pulse is applied to the diamond crystal (340).

[0045] Meanwhile, the optical experiment unit (300) according to an embodiment of the present invention may be configured to include a DAQ data collector. The DAQ data collector can receive and record the detection signal of the photodetector (370) described later.

[0046] The DAQ data collector can convert and store an analog signal detected by the photodetector (370) into a digital signal through analog-to-digital conversion. Here, the DAQ data collector can receive a pulse signal output from the pulse generator (210) and convert and store the detection signal of the photodetector (370) in synchronization with it.

[0047] The optical experiment unit (300) according to an embodiment of the present invention may be configured to include a control terminal (250). In an embodiment of the present invention, the control terminal (250) is exemplified as being implemented in the form of a separate terminal, such as a laptop, without constituting an electronic control unit (200), but it is understood that it can be implemented as an electronic control unit (200) while being housed in a lower housing (120).

[0048] Here, the control terminal (250) can generate and output a control signal to control the wavelength of the laser module (220), the output control of the microwave signal generator (230), and the pitch of the pulse signal output from the pulse generator (210).

[0049] In addition, the control terminal (250) can receive the detection signal of the photodetector (370) collected by the DAQ data collector and analyze it. To this end, an application program for operating the diamond NV-centered educational quantum experiment device (10) according to an embodiment of the present invention may be installed on the control terminal (250), and various experiments of the diamond NV-centered educational quantum experiment device (10) or experimental results can be checked through the user interface screen provided by the application program.

[0050] Meanwhile, the optical experiment unit (300) according to an embodiment of the present invention is installed inside the upper housing (110) of the main body (100) and can perform a diamond NV center-based quantum experiment.

[0051] Here, a plurality of optical experimental components constituting the optical experimental unit (300) can be detachably installed inside the upper housing (110), and at this time, the installation position can be changed.

[0052] Through this, the optical experiment unit (300) according to an embodiment of the present invention provides a plurality of types of diamond NV center-based quantum experiments. In one embodiment, the optical experiment unit (300) provides at least one of a basic qubit experiment, an external magnetic field sensing experiment, a temperature sensing experiment, and an external electric field sensing experiment.

[0053] FIG. 3 is a diagram showing an example of the setup of an optical experiment unit (300) for a basic qubit experiment in a diamond NV center-based educational quantum experiment device (10) according to an embodiment of the present invention.

[0054] In one embodiment, the optical experimental unit (300) may be configured to include an external magnetic field source such as a diamond crystal (340), a microwave antenna (351), a permanent magnet (352), a fiber optic port (310), an acousto-optic modulator (320), and a photodetector (370). Additionally, the optical experimental unit (300) may be configured to include a light splitter (330), a Compound Parabolic Concentrator (CPC, 361), a light filter (362), a condensing lens (363), and a reflective mirror (371).

[0055] In one embodiment, an external magnetic field source such as a diamond crystal (340), a microwave antenna (351), a permanent magnet (352), a fiber optic port (310), an acousto-optic modulator (320), and a photodetector (370) may be a group of fixed components to be described later that constitute the basic setup for a basic qubit experiment, and a light splitter (330), a Compound Parabolic Concentrator (CPC, 361), a light filter (362), a condensing lens (363), and a reflective mirror (371) may be a group of variable components to be described later.

[0056] The diamond crystal (340) is prepared as a crystal with a diamond nitrogen void center formed for a diamond NV center-based quantum experiment.

[0057] A microwave antenna (351) according to an embodiment of the present invention outputs a microwave pulse output from a signal amplifier (231) of an electronic control unit (200) to a diamond crystal (340). Then, a permanent magnet (352) applies a magnetic field to the diamond crystal (340).

[0058] The optical fiber port (310) is connected to the laser module (220) of the electronic control unit (200) via an optical fiber (311) and outputs a laser output from the laser module (220) to the acousto-optic modulator (320). In one embodiment, the laser output through the laser module (220) is 532 nm.

[0059] The acousto-optic modulator (320) can convert a laser irradiated from the optical fiber port (310) into a laser pulse and output it under the control of the AOM driver (240) of the electronic control unit (200).

[0060] And, the optical splitter (330) splits the laser pulse from the acousto-optic modulator (320) into a diamond crystal (340) direction and a reference direction, the laser pulse directed toward the diamond crystal (340) passes through the diamond crystal (340) and is detected by the photodetector (370), and the laser pulse directed toward the reference direction is detected by the photodetector (370) without passing through the diamond crystal (340).

[0061] Generally, the intensity of the laser irradiated from the laser module (220) is not completely constant due to the mixing of noise. Therefore, when measuring the optical signal that has passed through the diamond crystal (340), the influence of noise can be reduced by irradiating a portion of the photodetector (370) with a 532 nm laser and using it as a reference point.

[0062] When a laser pulse passing through the light splitter (330) is irradiated onto a diamond crystal (340), a fluorescent signal is generated, and the fluorescent signal is collected through the CPC (361) and the light-collecting lens (363), passes through the light filter (362), and is detected by the light detector (370).

[0063] Based on the above configuration, the basic measurement principle of the diamond NV center-based educational quantum experiment device (10) according to the embodiment of the present invention is explained as follows.

[0064] A laser pulse, for example, a 532 nm laser pulse, is used to transition the NV center from the ground state to the excited state. The NV center, having transitioned to the excited state, returns to the ground state while emitting an optical signal of a wavelength of 640 to 800 nm.

[0065] Optical processes can be divided into two processes, and in most cases, the excited states ms = 0 and ms = ±1 return to the ground states ms = 0 and ms = ±1, respectively. While ms = 0 mostly returns from the excited state to the ground state, the excited state ms = ±1 returns to the ground state ms = 0 via a metastable state; this process takes longer than a typical optical process and emits light of wavelengths outside the visible spectrum.

[0066] Therefore, if a 532 nm laser pulse is irradiated onto a diamond crystal (340) for a sufficient amount of time, the NV spin qubit is initialized to a ground state ms = 0 state, and if only an optical signal of wavelength 640 to 800 nm is measured using an optical filter (362), the ground state ms = 0 state or ms = ±1 state can be distinguished depending on the intensity of this signal.

[0067] The superimposed ms = +1 and ms = -1 states are separated by the effect when an external magnetic field is present. These changes in energy levels can be detected by measuring changes in the optical signal while sweeping the microwaves. This is because when the frequency of the microwaves matches the frequency difference between the ms = 0 state and the ms = ±1 state, a change in the spin state occurs, causing the intensity of the optical signal to decrease.

[0068] In the absence of an external magnetic field, a dip occurs at D = 2.87 GHz, and in the presence of an external magnetic field, two resonance signals are generated as the energy levels of the ms = +1 and ms = -1 states differ due to the magnetic field effect.

[0069] This measurement method is called ODMR measurement, and external magnetic field sensing experiments, temperature sensing experiments, and external electric field sensing experiments that can be performed through the diamond NV center-based educational quantum experiment device (10) according to an embodiment of the present invention can be performed based on the ODMR measurement method.

[0070] Also, at the center of NV, ms = 0 and ms = When microwaves corresponding to an energy difference are continuously applied, the electrons will oscillate between these two energy states. At this time, by irradiating microwaves in the form of pulses and controlling the irradiation time, the electrons can be placed in a superposition state between the two energy states. By utilizing this, various qubit and quantum sensing experiments utilizing quantum superposition can be implemented.

[0071] Meanwhile, as previously explained, the optical experimental component constituting the optical experimental unit (300) is installed detachably inside the upper housing (110), and is installed in a way that allows the installation position to be changed.

[0072] FIG. 4 is a diagram illustrating an example of a method for combining optical experiment components in an optical experiment section (300) of a diamond NV center-based educational quantum experiment device (10) according to an embodiment of the present invention.

[0073] Referring to FIG. 4, the upper housing (110) according to an embodiment of the present invention may be configured to include a base plate (112).

[0074] The base plate (112) forms the bottom surface of the upper housing (110). Here, as an example, a plurality of fastening holes (113) are formed on the plate surface of the base plate (112).

[0075] A plurality of fastening holes (113) can be arranged in a matrix form on the base plate (112) in a spaced-apart manner. Here, each fastening hole (113) can be formed to penetrate the base plate (112) in an upward and downward direction.

[0076] Through this, each optical experimental component is mounted to a fastening hole (113) via a bolt connection, and the installation position of the optical experimental component can be changed according to the position of the connected fastening hole (113) among the plurality of fastening holes (113).

[0077] In FIG. 4, an example is provided in which a plurality of reflective mirrors (371, 371a, 371b, 372a, 372b, 372c, 372d) are additionally installed to form a light path.

[0078] In one embodiment, a plurality of optical experimental components may be divided into a fixed component group and a variable component group.

[0079] The fixed component group consists of components that are fixedly installed regardless of the type of diamond NV-centered quantum experiment. On the other hand, the variable component group consists of components that are replaced depending on the type of diamond NV-centered quantum experiment.

[0080] In addition, in each type of diamond NV-centered quantum experiment, the components corresponding to the basic setup can be classified as a fixed component group, and the components added to increase the efficiency or accuracy of the experiment can be classified as a variable component group.

[0081] In one embodiment, the parts belonging to the variable part group may be replaced or optionally installed depending on the type of diamond NV center-based quantum experiment.

[0082] FIG. 5 is a diagram showing an example of the setup of an optical experimental unit (300) for an external magnetic field sensing experiment in a diamond NV center-based educational quantum experimental device (10) according to an embodiment of the present invention.

[0083] In the setup of the optical experimental unit (300) for the external magnetic field sensing experiment shown in FIG. 5, a Helmholtz coil (380) that applies a DC magnetic field and an AC magnetic field to a diamond crystal (340) can be additionally installed as a variable component group in the setup of the basic qubit experiment shown in FIG. 3.

[0084] The optical experimental components applied to the setup of the basic qubit experiment shown in Fig. 3 form a fixed component group, and the Helmholtz coil (380) added to the external magnetic field sensing experiment is added as a variable component group.

[0085] FIG. 6 is a diagram showing an example of the setup of an optical experimental unit (300) for a temperature sensing experiment in a diamond NV center-based educational quantum experimental device (10) according to an embodiment of the present invention.

[0086] In the setup of the optical experimental unit (300) for the temperature sensing experiment shown in FIG. 6, a temperature control kit (381) for controlling the temperature of the diamond crystal (340) can be additionally installed as a variable component group in the setup of the basic qubit experiment shown in FIG. 3.

[0087] The optical experimental components applied to the setup of the basic qubit experiment shown in Fig. 3 form a fixed component group, and the temperature control kit (381) added to the temperature sensing experiment is added as a variable component group.

[0088] FIG. 7 is a diagram showing an example of the setup of an optical experimental unit (300) for an external electric field sensing experiment in a diamond NV center-based educational quantum experimental device (10) according to an embodiment of the present invention.

[0089] In the setup of the optical experimental unit (300) for the external electric field sensing experiment shown in FIG. 7, a Helmholtz coil (380) that applies a DC magnetic field and an AC magnetic field to the diamond crystal (340) and an electrode (382) that applies an electric field may be additionally installed as a variable component group in the setup of the basic qubit experiment shown in FIG. 3.

[0090] The optical experimental components applied to the setup of the basic qubit experiment shown in FIG. 3 form a fixed component group, and the Helmholtz coil (380) and electrode (382) added to the external electric field sensing are added as a variable component group.

[0091] Meanwhile, in the above-described embodiment, each individual optical experimental component is described as being individually mounted on the base plate (112). In another embodiment, as shown in FIG. 4, a number of components can be modularized (NVA) and the modularized components can be mounted on the base plate (112).

[0092] For example, a diamond crystal (340), a CPC (361), a condensing lens (363), and a light filter (362) can be modularized and utilized as a variable component group for basic qubit experiments.

[0093] Likewise, the diamond crystal (340), CPC (361), condensing lens (363), optical filter (362), and Helmholtz coil (380) can be modularized into one and utilized as a variable component group for external magnetic field sensing experiments.

[0094] Likewise, the diamond crystal (340), CPC (361), condensing lens (363), optical filter (362), and temperature control kit (381) can be modularized into one, and the diamond crystal (340), CPC (361), condensing lens (363), optical filter (362), Helmholtz coil (380), and electrode (382) can be modularized into one, so that they can be utilized as variable component groups for temperature sensing experiments and external electric field sensing experiments, respectively.

[0095] Although some embodiments of the present invention have been illustrated and described, those skilled in the art will understand that modifications can be made to these embodiments without departing from the principles or spirit of the invention. The scope of the invention will be defined by the appended claims and their equivalents.

[0096] [Explanation of the symbol]

[0097] 10: Educational Quantum Experiment Device

[0098] 100 : Main body 110 : Upper housing

[0099] 111: Open / close cap 112: Base plate

[0100] 113 : Fastening hole 120 : Lower housing

[0101] 121: Power button 122: Laser button

[0102] 123 : Display unit 200 : Electronic control unit

[0103] 210: Pulse generator 220: Laser module

[0104] 230: Microwave signal generator 231: Signal amplifier

[0105] 232 : Signal switch 240 : AOM driver

[0106] 250 : Control terminal 300 : Optical experiment unit

[0107] 310: Fiber optic port 311: Optical fiber

[0108] 320: Acoustic-optic modulator 330: Optical splitter

[0109] 340: Diamond crystal 351: Microwave antenna

[0110] 352 : Permanent Magnet 361 : CPC

[0111] 362 : Optical filter 363 : Condensing lens

[0112] 370 : Photodetector

[0113] 371, 371a, 371b, 372a, 372b, 372c, 372d: Reflective mirrors

[0114] 380 : Helmholtz coil 381 : Temperature control kit

[0115] 382 : Electrode

[0116] The present invention can be applied to the field of devices used in educational quantum experiments, particularly diamond NV-centered educational quantum experiments.

Claims

In a diamond NV-centered educational quantum experiment device, A main body having an upper housing and a lower housing, and An optical experimental section installed inside the upper housing above, where a diamond NV center-based quantum experiment is performed, and It includes an electronic control unit installed inside the lower housing above and controlling the diamond NV center-based quantum experiment by the optical experiment unit above; A diamond NV-centered educational quantum experiment device characterized in that a plurality of optical experiment components constituting the optical experiment section are detachably installed inside the upper housing, and are installed in a manner that allows for changes in their installation positions. In paragraph 1, The upper housing above is A base plate forming a bottom surface, and A diamond NV center-based educational quantum experiment device characterized by including a plurality of fastening holes arranged in a matrix form in a mutually spaced state on the base plate and formed through the base plate in the vertical direction, wherein each of the optical experiment components is fastened through a bolt connection. In paragraph 2, A diamond NV center-based educational quantum experiment device characterized in that each of the above-mentioned optical experiment components can have its installation position changed according to the position of the combined fastening hole among a plurality of the above-mentioned fastening holes. In paragraph 1, A plurality of the above optical experimental components are A group of fixed parts that are fixed regardless of the type of the above diamond NV-centered quantum experiment; A diamond NV-centered educational quantum experiment device characterized by being divided into groups of variable parts that are replaced according to the type of the diamond NV-centered quantum experiment. In paragraph 4, The above fixed part group Diamond crystals and, A microwave antenna for irradiating microwaves onto the above diamond crystal, and An external magnetic field source that applies a magnetic field to the above diamond crystal, and A fiber optic port that irradiates a laser, and An acousto-optic modulator (AOM) that converts a laser irradiated from the above fiber optic port into a laser pulse, and A diamond NV-centered educational quantum experiment device characterized by including a photodetector that detects a fluorescence signal emitted from a diamond crystal by a laser pulse emitted from the acousto-optic modulator. In paragraph 4, A diamond NV-centered educational quantum experiment device characterized by the above-mentioned variable component group being installed interchangeably or selectively depending on the type of diamond NV-centered quantum experiment. In paragraph 4, The above diamond NV-centered quantum experiment is Basic qubit experiments and, An external magnetic field sensing experiment in which a Helmholtz coil applying a DC magnetic field and an AC magnetic field to the diamond crystal is additionally installed in the basic qubit experiment setup as a variable component group, and A temperature sensing experiment in which a temperature control kit for controlling the temperature of the above diamond crystal is additionally installed in the above basic qubit experiment setup as the above variable component group, and A diamond NV-centered educational quantum experiment device characterized by comprising at least one of an external electric field sensing experiment in which a Helmholtz coil applying a DC magnetic field and an AC magnetic field to the diamond crystal and an electrode applying an electric field are additionally installed in the basic qubit experiment setup as a variable component group.

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