Observation of Josephson effect in^(23)Na spinor Bose-Einstein condensates  

作　　者：Yong Qin Xin Wang Jun Jian Wenliang Liu Jizhou Wu Yuqing Li Jie Ma Liantuan Xiao Suotang Jia 秦永;王鑫;蹇君;刘文良;武寄洲;李玉清;马杰;肖连团;贾锁堂

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Chinese Physics B》2025年第3期361-365,共5页中国物理B(英文版)

基　　金：Project supported by the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302103);the National Natural Science Foundation of China(Grant Nos.62325505,62020106014,62175140,62475138,92165106,12104276);the Shanxi Province Graduate Student Research Innovation Project(Grant No.2024KY105)。

摘　　要：The Josephson effect,an important quantum supercurrent phenomenon,has been extensively studied in superconductors and superfluids.In this paper,we investigate the rich physics of one-dimensional Josephson junctions in a red-detuned optical lattice with sodium(Na)quantum gas.A one-dimensional Josephson array is formed by setting up an optical lattice using a red-detuned laser.By characterizing the dependence of Josephson oscillations of the lattice depth,we experimentally demonstrate the Josephson current.The lattice depth is controlled by altering the lattice power,and our observations are consistent with theoretical predictions.These findings offer valuable insights into quantum coherent transport and the intricate dynamics inherent to superfluidity.

关 键 词：Josephson junction Josephson critical current optical lattice Bose-Einstein condensates 

分 类 号：O51[理学—低温物理]