发表刊物：Physical Review Letters

关键字：Quantum entanglement; Quantum computation; Optical lattice

摘要：Ultracold atoms in optical lattices form a competitive candidate for quantum computation owing to the excellent coherence properties, the highly parallel operations over spins, and the ultralow entropy achieved in qubit arrays. For this, a massive number of parallel entangled atom pairs have been realized in superlattices. However, the more formidable challenge is to scale up and detect multipartite entanglement, the basic resource for quantum computation, due to the lack of manipulations over local atomic spins in retroreflected bichromatic superlattices. In this Letter, we realize the functional building blocks in quantum-gate-based architecture by developing a cross-angle spin-dependent optical superlattice for implementing layers of quantum gates over moderately separated atoms incorporated with a quantum gas microscope for single-atom manipulation and detection. Bell states with a fidelity of 95.6(5)% and a lifetime of 2.20±0.13 s are prepared in parallel, and then connected to multipartite entangled states of one-dimensional ten-atom chains and two-dimensional plaquettes of 2×4 atoms. The multipartite entanglement is further verified with full bipartite nonseparability criteria. This offers a new platform toward scalable quantum computation and simulation.

合写作者：Wei-Yong Zhang et al

论文类型：期刊论文

学科门类：理学

文献类型：J

卷号：131

期号：7

页面范围：073401

是否译文：否

发表时间：2023-08-18

收录刊物：SCI

发布期刊链接：https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.073401