High-Fidelity Single-Qubit Gates on Neutral Atoms in a Two-Dimensional Magic-Intensity Optical Dipole Trap Array
| Autor: | Peng Xu, Xiaodong He, Ruijun Guo, Kunpeng Wang, Xiong Zongyuan, Min Liu, Mingsheng Zhan, Jin Wang, Cheng Sheng |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Coherence time Energetic neutral atom Linear polarization General Physics and Astronomy 02 engineering and technology Trapping 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Dipole Qubit 0103 physical sciences 010306 general physics 0210 nano-technology AND gate Quantum computer |
| Zdroj: | Physical Review Letters. 121 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.121.240501 |
| Popis: | As a conventional approach, optical dipole trap (ODT) arrays with linear polarization have been widely used to assemble neutral-atom qubits for building a quantum computer. However, due to the inherent scalar differential light shifts (DLS) of qubit states induced by trapping fields, the microwave-driven gates acting on single qubits suffer from errors on the order of 10^{-3}. Here, we construct a DLS compensated ODT array based upon a recently developed magic-intensity trapping technique. In such a magic-intensity optical dipole trap (MI-ODT) array, the detrimental effects of DLS are efficiently mitigated so that the performance of global microwave-driven Clifford gates is significantly improved. Experimentally, we achieve an average error of (4.7±1.1)×10^{-5} per global gate, which is characterized by randomized benchmarking in a 4×4 MI-ODT array. Moreover, we experimentally study the correlation between the coherence time and gate errors in a single MI-ODT with an optimum error per gate of (3.0±0.7)×10^{-5}. Our demonstration shows that MI-ODT array is a versatile platform for building scalable quantum computers with neutral atoms. |
| Databáze: | OpenAIRE |
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