Ion trap device and quantum computing equipment

Abstract

The utility model provides an ion trap device and quantum computing equipment comprising the ion trap device, and the ion trap device comprises an ion trap; the cavity is used for sealing the ion trap; the plane window is arranged on the side wall of the cavity; the parabolic reflector is arranged in the cavity and concaves towards the plane window, and ions trapped in the ion trap are arranged at the focal point of the parabolic reflector; wherein the parabolic reflector and the ion lens are coaxially arranged. By using the ion trap device provided by the utility model, the fluorescence collection efficiency of the ion trap can be improved without using an objective lens, and for quantum computing equipment, more accurate, more reliable and more efficient quantum computing can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of quantum computers, and in particular to an ion trap device and a quantum computing device including the ion trap device. Background Art

[0002] At present, the research and development and application of ion trap-based quantum computers are being accelerated. Such a quantum computing device mainly uses an ion trap to trap ions and manipulate their quantum states to achieve the storage and manipulation of qubits. At the same time, it also uses quantum entanglement to achieve quantum parallel computing and quantum state transmission, and reads the state of qubits by measuring the physical properties of ions, thereby completing quantum computing tasks. Since reading the state of qubits is a necessary step in the output of quantum computing, it is necessary to collect the fluorescent photons emitted by ions from the ion trap. Summary of the Invention

[0003] The purpose of the utility model is to provide an ion trap device and a quantum computing device including the ion trap device.

[0004] The utility model provides an ion trap device, which includes: an ion trap; a cavity for sealing the ion trap; a planar window provided on the side wall of the cavity; a parabolic mirror provided inside the cavity and concave towards the planar window, and the ions trapped in the ion trap are provided at the focus of the parabolic mirror; wherein, the parabolic mirror and the ions are coaxially arranged.

[0005] Preferably, the ions radiate fluorescence into the surrounding space with equal probability at a 4π solid angle.

[0006] Preferably, the ions are one of ytterbium ions, calcium ions and barium ions.

[0007] Preferably, the ion trap is one of a blade trap, a quadrupole trap and a needle electrode trap.

[0008] Preferably, the parabolic mirror is made of one of fused quartz, sapphire, ceramic and stainless steel.

[0009] Preferably, the surface of the parabolic mirror is coated with a reflective film for enhancing the reflection of fluorescence.

[0010] Preferably, the surface of the parabolic mirror is coated with an indium tin oxide film for reducing charge accumulation.

[0011] The utility model also provides a quantum computing device, which includes the ion trap device as described above.

[0012] The utility model can improve the fluorescence collection efficiency of the ion trap without using an objective lens. For a quantum computing device, the utility model can significantly improve the accuracy and efficiency of quantum state detection, thereby improving the fidelity of quantum bit state reading, enhancing the coherence of quantum bits, improving the fidelity of quantum gate operations, and accelerating its quantum computing process, etc., which will contribute to achieving more accurate, reliable, and efficient quantum computing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above objects and features of the present utility model will become clearer through the following description in conjunction with the drawings.

[0014] Figure 1 The structural schematic diagram of the ion trap device of the present utility model is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Hereinafter, embodiments of the present utility model will be described in detail with reference to the drawings.

[0016] Referring to Figure 1 , the ion trap device of the present utility model at least includes an ion trap (not shown in the figure), a cavity 101, a planar window 102, and a parabolic mirror 103.

[0017] In Figure 1 the ion trap device shown, the cavity 101 is used to seal the ion trap; the planar window 102 is arranged on the side wall of the cavity 101; the parabolic mirror 103 is arranged inside the cavity 101 and concave towards the planar window 102, and the ion 100 trapped in the ion trap is arranged at the focus of the parabolic mirror 103; wherein, the parabolic mirror 103 and the ion 100 are coaxially arranged. The coaxial arrangement can ensure that the collected fluorescence is transmitted along the same optical axis, optimizing the focusing effect of the fluorescence, reducing stray light in the optical path, improving the fluorescence collection efficiency and focusing quality, and achieving efficient photon collection.

[0018] In Figure 1 the ion trap device shown, the fluorescence emitted by the ion 100 trapped in the ion trap can be collected by the parabolic mirror 103 on the left side. Since the ion 100 trapped in the ion trap is arranged at the focus of the parabolic mirror 103, the fluorescence radiated by the ion 100 within the aperture range of the parabolic mirror 103 on the left side can be reflected by the parabolic mirror 103 into parallel light perpendicular to the planar window 102, and then transmitted through the planar window 102 to a light detection device (not shown in the figure) for detection.

[0019] Therefore, by using the ion trap device provided by the present utility model, the collected fluorescence can be collimated into parallel light that vertically enters the planar window inside the cavity, minimizing the optical loss caused by the refraction of the collected fluorescence when passing through the planar window. This not only eliminates the need for an objective lens outside the cavity but also further improves the fluorescence collection efficiency of the ion trap.

[0020] In Figure 1 the ion trap device shown, the ion trap can be sealed in a cryogenic ultra-high vacuum environment inside the cavity. Such a vacuum environment helps improve the performance, stability, and application range of the ion trap.

[0021] In Figure 1 the ion trap device shown, the ion 100 can radiate fluorescence into the surrounding space with equal probability at a 4π solid angle. This ensures that the fluorescence signal can cover a very large angular range, further improving the fluorescence collection efficiency of the ion trap.

[0022] In Figure 1 the ion trap device shown, the ion 100 can be a ytterbium ion, a calcium ion, a barium ion, or other particles suitable for being trapped in the ion trap. There is no limitation to this invention. The ion trap for trapping the ion 100 can be a blade trap, a quadrupole trap, a needle electrode trap, or other types of ion traps. There is also no limitation to this invention.

[0023] In Figure 1 the ion trap device shown, the parabolic mirror 103 can be made of materials such as, but not limited to, fused quartz, sapphire, ceramic, and stainless steel. These materials each have their unique advantages. Fused quartz has high transparency and good ultraviolet transmittance. Sapphire has high hardness and good thermal conductivity. Ceramic materials have high purity and excellent ion storage ability. Stainless steel has good stability and workability. The most suitable material can be selected according to the specific working environment requirements and conditions to prepare the parabolic mirror.

[0024] In Figure 1 the ion trap device shown, the surface of the parabolic mirror 103 can be coated with a reflective film for enhancing the reflection of fluorescence to further improve the fluorescence collection efficiency of the ion trap. In addition, the surface of the parabolic mirror 103 can also be coated with an indium tin oxide (ITO) film for reducing charge accumulation to reduce the impact of accumulated charges on the fluorescence collection efficiency and quality. The accumulation of these charges on the surface of the spherical mirror can form an electrostatic field, which can interfere with the propagation of fluorescence photons, causing some fluorescence photons to be reflected, scattered, or absorbed, thus reducing the fluorescence collection efficiency.

[0025] The ion trap device provided by the present utility model can be applied to a quantum computing device that uses an ion trap to achieve quantum bit storage and operation, so as to improve the fluorescence collection efficiency of the ion trap. For a quantum computing device, an improvement in fluorescence collection efficiency means that more fluorescence photons can be collected, thereby improving the accuracy and precision of quantum bit state reading. This is crucial for performing quantum gate operations, implementing quantum algorithms, and verifying quantum computing results. Additionally, an improvement in fluorescence collection efficiency also means that enough fluorescence photons can be collected in a shorter time to determine the state of the quantum bit. This can significantly accelerate the reading speed of the quantum bit and further improve the execution efficiency of quantum computing. Moreover, an improvement in fluorescence collection efficiency also helps to more accurately read the state of the quantum bit, thereby reducing the degradation of quantum bit fidelity caused by reading errors. High-fidelity quantum bits are the basis for performing high-precision quantum computing and quantum error correction.

[0026] Therefore, using a quantum computing device including the present utility model can more accurately read the state of the quantum bit, reduce errors, improve the accuracy and reliability of quantum computing, and promote the development of quantum computing applications.

[0027] Although the present utility model has been shown and described with reference to the preferred embodiments, those skilled in the art should understand that various modifications and variations can be made to these embodiments without departing from the spirit and scope of the present application as defined by the claims.

Claims

1. An ion trap device, characterized in that: include: Ion trap; A cavity, used to seal the ion trap; A plane window is arranged on the side wall of the cavity; A parabolic reflector is arranged inside the cavity and concave toward the plane window, and the ions trapped in the ion trap are arranged at the focus of the parabolic reflector; Wherein, the parabolic reflector and the ions are coaxially arranged.

2. The device according to claim 1, characterized in that The ions radiate fluorescence with equal probability into the surrounding space at a solid angle of 4π.

3. The device according to claim 1, characterized in that The ion is one of ytterbium ion, calcium ion and barium ion.

4. The device according to claim 1, characterized in that The ion trap is one of a blade trap, a quadrupole trap and a needle trap.

5. The device according to claim 1, characterized in that The parabolic reflector is made of one of fused quartz, sapphire, ceramic and stainless steel.

6. The device according to claim 1, characterized in that The surface of the parabolic reflector is coated with a reflective film for enhancing reflection of fluorescent light.

7. The device according to claim 1, characterized in that The surface of the parabolic reflector is coated with a tin-doped indium oxide film for reducing charge accumulation.

8. A quantum computing device, characterized in that An ion trap device comprising any one of claims 1-7.

Images