Li Meng-Da, Lin Wan, Luo An, Zhang Wei-Yong, Sun Hui, Xiao Bo, Zheng Yong-Guang, Yuan Zhen-Sheng, Pan Jian-Wei
Opt Express. 2021 Apr 26;29(9):13876-13886. doi: 10.1364/OE.423776.
Optical superlattice has a wide range of applications in the study of ultracold atom physics. Especially, it can be used to trap and manipulate thousands of atom pairs in parallel which constitutes a promising system for quantum simulation and quantum computation. In the present work, we report on a high-power optical superlattice formed by a 532-nm and 1064-nm dual-wavelength interferometer with a short lattice spacing of 630 nm. The short-term fluctuation (in 10 seconds) of the relative phase between the short lattice and the long lattice is measured to be 0.003π, which satisfies the needs for performing two-qubit gates among neighboring lattice sites. We further implement this superlattice in a Rb experiment with a quantum gas microscope of single-site resolution, where the high-power 532-nm laser is necessary for pinning atoms in the short lattice during imaging, providing a unique platform for engineering quantum states.
光学超晶格在超冷原子物理研究中有着广泛的应用。特别是，它可用于并行捕获和操纵数千对原子，这构成了一个用于量子模拟和量子计算的有前景的系统。在本工作中，我们报道了一种由532纳米和1064纳米双波长干涉仪形成的高功率光学超晶格，其晶格间距短至630纳米。短晶格和长晶格之间相对相位的短期波动（10秒内）测量值为0.003π，满足在相邻晶格位点之间执行双量子比特门的需求。我们进一步在具有单位点分辨率的量子气体显微镜的铷实验中实现了这种超晶格，其中高功率532纳米激光对于在成像期间将原子固定在短晶格中是必要的，为工程量子态提供了一个独特的平台。
