Homogenized exciting light generating and exciting device for quantum bits
Through the homogenization excitation light generation device of the qubit, the Gaussian spot is modulated into a homogenized spot and illuminated to each other, solving the problem of inconsistent excitation light intensity in quantum computing, realizing unified control and efficient gate control of qubits .
Patent Information
- Application Number
- CN202420180399.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-24
AI Technical Summary
In quantum computing, Gaussian spots are difficult to use for gate manipulation of a large number of qubits because the excitation light intensity per qubit is different, making it difficult to control uniformly.
By designing a homogenized excitation light generating device for qubits, the first and second excitation light components are homogenized and reflected, forming a homogenized light spot, and irradiating it to the qubits in opposite directions, so that each qubit is made by homogenized and reflected by the first and second excitation light components, forming a homogenized light spot, and irradiating it to the qubits in opposite directions, so that each qubit is made by radiating each qubit. The light intensity felt is the same. The device includes a laser generation mechanism, a homogenization mechanism, a reflection mechanism and a collimating beam expansion mechanism to ensure uniformity and consistency of the light spot.
The same light intensity per qubit is realized, which reduces the complexity of gate manipulation and reduces calculation errors, and is suitable for gate manipulation of a large number of qubits.
Smart Images
Figure CN222189602U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of quantum computing technology, and in particular, to a device for generating and exciting homogenized excitation light for a quantum bit. Background Art
[0002] In quantum computing, excitation light is usually used to perform gate control on qubits. If the excitation light intensity felt by each qubit is the same, the gate control time for each qubit is the same constant value, and the qubits can be uniformly controlled for complex calculations. If the excitation light intensity felt by each qubit is different, it is difficult to uniformly control the qubits. Therefore, the excitation light power felt by each qubit is ensured in order to perform uniform gate control.
[0003] However, the laser spot emitted from the optical fiber is a Gaussian spot, and its light intensity conforms to the Gaussian distribution, that is, the intensity is highest in the middle and decreases toward the edge. If such a Gaussian spot is used for a single or very few quantum bits, it is sufficient because the quantum bits can always be placed in an area with the same Gaussian spot intensity. However, when the number of quantum bits increases and becomes a rectangular array, no matter how they are arranged, each quantum bit will feel a different intensity of the excitation light. Therefore, such a Gaussian spot cannot be used for gate manipulation of a large number of quantum bits. Utility Model Content
[0004] An embodiment of the present application provides a device for generating uniform excitation light for a quantum bit, which modulates a Gaussian light spot into a uniform light spot and can be used for gate control of a large number of quantum bits.
[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.
[0006] According to a first aspect of an embodiment of the present application, a device for generating homogenized excitation light for a quantum bit is provided, comprising:
[0007] The first excitation light component includes a first laser generating mechanism for generating a first laser, a first homogenizing mechanism for homogenizing the first laser, and a first reflecting mechanism for reflecting the homogenized first laser;
[0008] The second excitation light component includes a second laser generating mechanism for generating a second laser, a second homogenizing mechanism for homogenizing the second laser, and a second reflecting mechanism for reflecting the homogenized second laser. The second laser is parallel to the first laser and has a frequency different from that of the first laser. The reflected second laser and the reflected first laser are irradiated onto the quantum bit in opposite directions.
[0009] In some embodiments of the present application, based on the aforementioned scheme, the first excitation light component also includes a first collimating and expanding mechanism, which is located between the first laser generating mechanism and the first homogenizing mechanism, and enters the first homogenizing mechanism after the first laser is collimated and expanded; the second excitation light component also includes a second collimating and expanding mechanism, which is located between the second laser generating mechanism and the second homogenizing mechanism, and enters the second homogenizing mechanism after the second laser is collimated and expanded.
[0010] In some embodiments of the present application, based on the aforementioned scheme, the first excitation light component also includes a first electric variable-focus lens, which is located between the first reflecting mechanism and the quantum bit, and focuses the reflected first laser and then irradiates it onto the quantum bit; the second excitation light component also includes a second electric variable-focus lens, which is located between the second reflecting mechanism and the quantum bit, and focuses the reflected second laser and then irradiates it onto the quantum bit.
[0011] In some embodiments of the present application, based on the aforementioned scheme, the first laser generating mechanism includes a first laser and a first coupling frame for generating a first laser, the first laser emits the first laser to the first coupling frame, and the first laser is emitted from the first coupling frame; the second laser generating mechanism includes a second laser and a second coupling frame for generating a second laser, the second laser emits the second laser to the second coupling frame, and the second laser is emitted from the second coupling frame.
[0012] In some embodiments of the present application, based on the aforementioned scheme, the first reflecting mechanism is a first reflecting mirror, and the incident angle between the first reflecting mirror and the homogenized first laser is 45°; the second reflecting mechanism is a second reflecting mirror, and the incident angle between the second reflecting mirror and the homogenized second laser is 45°.
[0013] In some embodiments of the present application, based on the aforementioned scheme, the first homogenization mechanism is a first phase modulator or a first metasurface lens array, and the second homogenization mechanism is a second phase modulator or a second metasurface lens array.
[0014] According to a second aspect of an embodiment of the present application, a quantum bit excitation device is provided, comprising the above-mentioned quantum bit homogenized excitation light generating device and an optical tweezers assembly for capturing cold atoms.
[0015] In some embodiments of the present application, based on the above scheme, the optical tweezers assembly includes:
[0016] a third laser generating mechanism for generating dipole light;
[0017] A laser phase modulator for phase modulating the dipole;
[0018] A strong focusing lens is used to focus the phase-modulated dipole light, and the focused dipole light, the reflected first laser light and the reflected second laser light intersect.
[0019] In some embodiments of the present application, based on the above solution, the third laser generating mechanism includes:
[0020] a third laser, generating a dipole light;
[0021] A third coupling frame, wherein the third laser emits a dipole light to the third coupling frame, and the dipole light is emitted from the third coupling frame.
[0022] In some embodiments of the present application, based on the above solution, it also includes:
[0023] The focused dipole light, the reflected first laser light and the reflected second laser light intersect in the vacuum cavity, and a cold atomic cluster is formed in the vacuum cavity.
[0024] The beneficial effects of this application are as follows:
[0025] The first laser generating mechanism generates a first laser, which is homogenized and reflected to form a reflected first laser. The second laser generating mechanism generates a second laser, which is homogenized and reflected to form a reflected second laser. The reflected second laser and the reflected first laser irradiate the quantum bit in opposite directions. The light intensity felt by the quantum bit is the sum of the light intensities of the reflected second laser and the reflected first laser. Since the reflected second laser and the reflected first laser are both homogenized lasers, the light intensity felt by the quantum bit is the same, so it can be used for gate control of a large number of quantum bits.
[0026] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0028] Figure 1 A schematic diagram of a device for generating homogenized excitation light for a quantum bit in an embodiment of the present application is shown;
[0029] Figure 2 A schematic diagram of a homogenized light spot in an embodiment of the present application is shown;
[0030] Figure 3 A schematic diagram of the light intensity distribution of the homogenized light spot in an embodiment of the present application is shown. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0032] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.
[0033] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.
[0034] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.
[0035] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.
[0036] Figure 1 A schematic diagram of a device for generating homogenized excitation light for a quantum bit in an embodiment of the present application is shown. Figure 1, the excitation light 1 is the first laser, the coupling frame 1 is the first coupling frame, the beam expansion system 1 is the first collimating beam expansion mechanism, the laser phase modulator 1 is the first phase modulator, the reflector 1 is the first reflector, the electric variable focus lens 1 is the first electric variable focus lens, the excitation light 2 is the second laser, the coupling frame 2 is the second coupling frame, the beam expansion system 2 is the second collimating beam expansion mechanism, the laser phase modulator 2 is the second phase modulator, the reflector 2 is the second reflector, the electric variable focus lens 2 is the second electric variable focus lens, and the coupling frame 3 is the third coupling frame, see Figure 1 , provides a quantum bit homogenized excitation light generating device, comprising at least a first excitation light component and a second excitation light component, which are described in detail as follows:
[0037] The first excitation light component includes a first laser generating mechanism for generating a first laser, a first homogenizing mechanism for homogenizing the first laser, and a first reflecting mechanism for reflecting the homogenized first laser.
[0038] Specifically, the first laser generating mechanism generates a first laser, the first homogenizing mechanism homogenizes the first laser generated by the first laser generating mechanism, and the first reflecting mechanism reflects the homogenized first laser to change the direction of the homogenized first laser so as to irradiate the quantum bit.
[0039] The second excitation light component includes a second laser generating mechanism for generating a second laser, a second homogenizing mechanism for homogenizing the second laser, and a second reflecting mechanism for reflecting the homogenized second laser. The second laser is parallel to the first laser and has a frequency different from that of the first laser. The reflected second laser and the reflected first laser are irradiated onto the quantum bit in opposite directions.
[0040] Specifically, the second laser generating mechanism generates a second laser, the second homogenizing mechanism homogenizes the second laser generated by the second laser generating mechanism, and the second reflecting mechanism reflects the homogenized second laser to change the direction of the homogenized second laser so as to irradiate the quantum bit. The homogenized first laser and the homogenized second laser are irradiated onto the quantum bit in opposite directions.
[0041] Optionally, the sum of the frequencies of the first laser and the second laser is the energy level difference of the quantum bit from the ground state to the Rydberg state, and the homogenized first laser and the homogenized second laser perform two-photon excitation on the quantum bit to achieve Rydberg excitation of the quantum bit, thereby performing two-bit gate manipulation of neutral atom quantum computing.
[0042] Specifically, during the Rydberg excitation process of a quantum bit, the power of the excitation light is related to the Rabi frequency of the quantum bit from the ground state to the Rydberg state, and the Rabi frequency is related to the transition time of the quantum bit from the ground state to the Rydberg state. Therefore, the power of the excitation light affects the control time of the two-bit gate. The specific relationship is as follows:
[0043] Ω∝√I, where T is the two-bit gate manipulation time, Ω is the Rabi frequency of the quantum bit from the ground state to the Rydberg state, and I is the intensity of the excitation light felt by the quantum bit. It can be seen that the two-bit gate manipulation time is related to the intensity of the excitation light felt by the quantum bit. In quantum computing, the gate manipulation time of each quantum bit should be as similar as possible to reduce the complexity of gate manipulation and reduce calculation errors. Therefore, the excitation light intensity felt by each quantum bit needs to be the same, that is, the excitation light intensity felt by each quantum bit is the same.
[0044] Optionally, the first excitation light component also includes a first collimating and expanding mechanism, which is located between the first laser generating mechanism and the first homogenizing mechanism, and enters the first homogenizing mechanism after the first laser is collimated and expanded; the second excitation light component also includes a second collimating and expanding mechanism, which is located between the second laser generating mechanism and the second homogenizing mechanism, and enters the second homogenizing mechanism after the second laser is collimated and expanded.
[0045] Specifically, the first collimating and beam expanding mechanism is used to increase the spot diameter of the first laser, and the second collimating and beam expanding mechanism is used to increase the spot diameter of the second laser. The spot diameter of the first laser and the spot diameter of the second laser can be increased as needed, for example, increased to 10 to 20 mm. The first homogenizing mechanism homogenizes the enlarged spot of the first laser, and the second homogenizing mechanism homogenizes the enlarged spot of the second laser. The first homogenizing mechanism and the second homogenizing mechanism can homogenize by adjusting the laser phase.
[0046] Optionally, the first excitation light component also includes a first electric variable focus lens, which is located between the first reflecting mechanism and the quantum bit, and focuses the reflected first laser and then irradiates it onto the quantum bit; the second excitation light component also includes a second electric variable focus lens, which is located between the second reflecting mechanism and the quantum bit, and focuses the reflected second laser and then irradiates it onto the quantum bit.
[0047] Specifically, by means of an external control signal, the focal length of the lens is slightly changed, and the first electric variable focus lens can slightly adjust the focal position of the first laser spot after homogenization, so that the focal position of the first laser spot is at the center of the quantum bit array. Similarly, by means of an external control signal, the focal length of the lens is slightly changed, and the second electric variable focus lens can slightly adjust the focal position of the second laser spot after homogenization, so that the focal position of the second laser spot is at the center of the quantum bit array. The first electric variable focus lens is used to adjust the focal position of the first laser spot after homogenization, or the second electric variable focus lens is used to adjust the focal position of the second laser spot after homogenization. When adjusting the focal position of the second laser spot after homogenization, the basis for adjustment is to judge the size of the Rabi frequency at the center of the quantum bit array. The larger the Rabi frequency at the center of the quantum bit array, the closer the focal position of the first laser spot after homogenization or the focal position of the second laser spot after homogenization is to the center of the quantum bit array. When the Rabi frequency at the center of the quantum bit array is the maximum value, it indicates that the first electric variable focus lens or the second electric variable focus lens has been adjusted into place, and the focal position of the first laser spot after homogenization or the focal position of the second laser spot after homogenization is at the center of the quantum bit array.
[0048] Optionally, the first laser generating mechanism includes a first laser for generating a first laser and a first coupling frame, the first laser emits the first laser to the first coupling frame, and the first laser is emitted from the first coupling frame; the second laser generating mechanism includes a second laser for generating a second laser and a second coupling frame, the second laser emits the second laser to the second coupling frame, and the second laser is emitted from the second coupling frame.
[0049] Optionally, the first reflecting mechanism is a first reflecting mirror, and the incident angle between the first reflecting mirror and the homogenized first laser is 45°; the second reflecting mechanism is a second reflecting mirror, and the incident angle between the second reflecting mirror and the homogenized second laser is 45°.
[0050] See also Figure 1 The first reflecting mirror allows the homogenized first laser to irradiate downward, and the second reflecting mirror allows the homogenized second laser to irradiate upward, so that the homogenized first laser and the homogenized second laser are irradiated toward each other.
[0051] Optionally, the first homogenization mechanism is a first phase modulator or a first metasurface lens array, and the second homogenization mechanism is a second phase modulator or a second metasurface lens array.
[0052] Specifically, taking the first phase modulator or the second phase modulator as an example, the first phase modulator or the second phase modulator may be a diffractive optical element, the first phase modulator is used to change the phase of the first laser so that the first laser spot changes from a Gaussian spot to a uniform spot, the second phase modulator is used to change the phase of the second laser so that the second laser spot changes from a Gaussian spot to a uniform spot, the first phase modulator may be obtained in the following manner: according to the preset light intensity distribution at the focal position of the uniform spot of the first laser, the phase diagram of the first phase modulator is inversely calculated by the GS algorithm (Gerchberg-Saxton algorithm), and the first phase modulator is obtained by etching, and similarly, The second phase modulator can be obtained by the preset light intensity distribution at the focal position of the homogenized light spot of the second laser and the GS algorithm (Gerchberg-Saxton algorithm). In actual application, the actual light intensity distribution at the focal position of the homogenized light spot of the first laser is different from the preset light intensity distribution at the focal position of the homogenized light spot of the first laser. It can be cycled multiple times to eventually make the actual light intensity distribution at the focal position of the homogenized light spot of the first laser the same as the preset light intensity distribution at the focal position of the homogenized light spot of the first laser. Similarly, the same method can be used to make the actual light intensity distribution at the focal position of the homogenized light spot of the second laser the same as the preset light intensity distribution at the focal position of the homogenized light spot of the second laser.
[0053] Figure 2 FIG. 1 shows a schematic diagram of a homogenized light spot in an embodiment of the present application. Figure 3 FIG. 1 shows a schematic diagram of the light intensity distribution of the homogenized light spot in the embodiment of the present application, see Figure 2 and Figure 3 The homogenized light spot of the first laser or the homogenized light spot of the second laser is a linear light spot with a length of 100 μm and a width of 30 μm, and the intensity in the middle is evenly distributed, and the light intensity distribution on the long axis is even. When the homogenized light spot of the first laser or the homogenized light spot of the second laser covers a large quantum bit array, the light intensity felt by each quantum bit in the quantum bit array is uniform, which reduces the complexity of gate control and reduces errors.
[0054] See also Figure 1 According to a second aspect of an embodiment of the present application, a quantum bit excitation device is provided, comprising the above-mentioned quantum bit homogenized excitation light generating device and an optical tweezers assembly for capturing cold atoms.
[0055] Optionally, the optical tweezers assembly comprises:
[0056] a third laser generating mechanism for generating dipole light;
[0057] A laser phase modulator for phase modulating the dipole;
[0058] A strong focusing lens is used to focus the phase-modulated dipole light, and the focused dipole light, the reflected first laser light and the reflected second laser light intersect.
[0059] Optionally, the third laser generating mechanism comprises:
[0060] a third laser, generating a dipole light;
[0061] A third coupling frame, wherein the third laser emits a dipole light to the third coupling frame, and the dipole light is emitted from the third coupling frame.
[0062] Optionally, it also includes:
[0063] The focused dipole light, the reflected first laser light and the reflected second laser light intersect in the vacuum cavity, and a cold atomic cluster is formed in the vacuum cavity.
[0064] Optionally, when a quantum bit homogenized excitation light generating device includes a first electric variable focus lens and a second variable focus lens, the focused dipole light, the focused first laser and the focused second laser intersect in the vacuum cavity.
[0065] Optionally, a cold atomic cluster is formed in a vacuum system through a magneto-optical trap system, and an optical tweezers assembly captures cold atoms from the cold atomic cluster, and the captured cold atoms form a quantum bit array.
[0066] In the present application, a first laser generating mechanism generates a first laser, which is homogenized, reflected and focused to form a focused first laser. A second laser generating mechanism generates a second laser, which is homogenized, reflected and focused to form a focused second laser. The focused second laser and the focused first laser are irradiated toward each other onto a quantum bit in a vacuum cavity. The light intensity felt by the quantum bit is the sum of the light intensities of the focused second laser and the focused first laser. Since the focused second laser and the focused first laser are both homogenized lasers, the light intensity felt by the quantum bit is the same, and thus can be used for gate control of a large number of quantum bits.
[0067] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.
[0068] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0069] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
[0070] If the integrated unit is implemented 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 solution of the present application can be essentially or partly or all or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.
[0071] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims
1. A device for generating homogenized excitation light for a quantum bit, characterized in that: include: The first excitation light component includes a first laser generating mechanism for generating a first laser, a first homogenizing mechanism for homogenizing the first laser, and a first reflecting mechanism for reflecting the homogenized first laser; The second excitation light component includes a second laser generating mechanism for generating a second laser, a second homogenizing mechanism for homogenizing the second laser, and a second reflecting mechanism for reflecting the homogenized second laser. The second laser is parallel to the first laser and has a frequency different from that of the first laser. The reflected second laser and the reflected first laser are irradiated onto the quantum bit in opposite directions.
2. A device for generating homogenized excitation light for a quantum bit according to claim 1, characterized in that: The first excitation light component also includes a first collimating and expanding mechanism, which is located between the first laser generating mechanism and the first homogenizing mechanism. After the first laser is collimated and expanded, it enters the first homogenizing mechanism; the second excitation light component also includes a second collimating and expanding mechanism, which is located between the second laser generating mechanism and the second homogenizing mechanism. After the second laser is collimated and expanded, it enters the second homogenizing mechanism.
3. The device for generating homogenized excitation light for a quantum bit according to claim 1, characterized in that: The first excitation light component also includes a first electric variable focus lens, which is located between the first reflection mechanism and the quantum bit, and focuses the reflected first laser and then irradiates it onto the quantum bit; the second excitation light component also includes a second electric variable focus lens, which is located between the second reflection mechanism and the quantum bit, and focuses the reflected second laser and then irradiates it onto the quantum bit.
4. The device for generating homogenized excitation light for a quantum bit according to claim 1, characterized in that: The first laser generating mechanism includes a first laser for generating a first laser and a first coupling frame, the first laser emits the first laser to the first coupling frame, and the first laser is emitted from the first coupling frame; the second laser generating mechanism includes a second laser for generating a second laser and a second coupling frame, the second laser emits the second laser to the second coupling frame, and the second laser is emitted from the second coupling frame.
5. The device for generating homogenized excitation light for a quantum bit according to claim 1, characterized in that: The first reflecting mechanism is a first reflecting mirror, and the incident angle between the first reflecting mirror and the homogenized first laser is 45°. The second reflecting mechanism is a second reflecting mirror, and the incident angle between the second reflecting mirror and the homogenized second laser is 45°.
6. The device for generating homogenized excitation light for a quantum bit according to claim 1, characterized in that: The first homogenizing mechanism is a first phase modulator or a first metasurface lens array, and the second homogenizing mechanism is a second phase modulator or a second metasurface lens array.
7. A quantum bit excitation device, characterized in that: The invention comprises a homogenized excitation light generating device for a quantum bit as described in any one of claims 1 to 6 and an optical tweezers component for capturing cold atoms.
8. A quantum bit excitation device according to claim 7, characterized in that: The optical tweezers assembly comprises: a third laser generating mechanism for generating dipole light; A laser phase modulator for phase modulating the dipole; A strong focusing lens is used to focus the phase-modulated dipole light, and the focused dipole light, the reflected first laser light and the reflected second laser light intersect.
9. A quantum bit excitation device according to claim 8, characterized in that: The third laser generating mechanism comprises: a third laser, generating a dipole light; A third coupling frame, wherein the third laser emits a dipole light to the third coupling frame, and the dipole light is emitted from the third coupling frame.
10. A quantum bit excitation device according to claim 8, characterized in that: Also includes: The focused dipole light, the reflected first laser light and the reflected second laser light intersect in the vacuum cavity, and a cold atomic cluster is formed in the vacuum cavity.