Addressing system for neutral atom quantum computation

Abstract

The invention discloses an addressing system for neutral atom quantum computation, and belongs to the field of neutral atom quantum computation. The system comprises a multi-channel light guiding device and an imaging light path unit, the multi-channel light guiding device comprises a plurality of light guiding channels, and addressing light beams are output through the light guiding channels and then focused on corresponding atomic quantum bits through the imaging light path unit. According to the addressing system provided by the invention, the addressing channels are mutually independent, the number of optimizable parameters is large, the expansibility is good, the addressing system is suitable for atom ground state addressing and Rydberg excitation addressing at the same time, and the optical path structure is simplified.

Description

Technical field: [0001] The invention relates to the field of quantum computing of neutral atoms, and more particularly relates to an addressing system for quantum computing of neutral atoms. Background technique: [0002] A universal quantum computer is a new type of computing instrument that is based on qubits as the basic hardware unit and controlled by quantum logic gates to achieve computing tasks. Because it utilizes unique computing resources such as quantum superposition state and quantum entanglement state, it shows the algorithm superiority over classical computer on many specific computing problems. , cryptography and other fields have broad application prospects. [0003] The neutral atom quantum computer constructed with neutral single atoms imprisoned in miniature optical traps as the basic qubit has unique advantages in bit number expansion, and has the advantages of coherence time, single-bit gate fidelity, and two-bit gate fidelity. It has also shown excel...

AI Technical Summary

Problems solved by technology

However, this scheme has the following problems: ①The scalability is not high, and the number of bits addressed at the same time is very small (1 to 2), which limits the execution efficiency of the quantum algorithm; Blocked quantum gate manipulation fidelity

In this scheme, the control of addressing light is flexible, and the number of bits that can be addressed at the same time is large, but there are still several problems: ① The addressing beams obtained through the diffraction of the acousto-optic processing device are not independent, and the frequency and space of the beams are not independent. Pointing to each other, the addressing spot can only exist in the form of a square array. When performing multi-bit parallel manipulation, in order to ensure that the frequencies of different addressing beams are consistent, many additional diffracted beams will be generated, and these additional beams will greatly Increase the crosstalk error of addressing manipulation; ②Acousto-optic processing devices have different diffraction angles for different wavelengths, resulting in ground-state manipulation addressing and Rydberg excitation addressing in neutral atom quantum computing cannot share the same acousto-optic processor, This will increase the complexity of the optical system and reduce the pointing stability of the addressing beam

Images