一维玻色约瑟夫森结的两点相位关联
Two-point phase correlations of a one-dimensional bosonic Josephson junction
摘要:
我们在原子芯片上利用量子简并玻色气体在可调双阱势中实现了一维约瑟夫森结。物质波干涉术可以直接获得相对相位场,它反映了由于隧穿引起的热驱动波动和相位锁定的相互作用。热平衡状态的特征在于通过探测两点相位关联的全统计分布函数。与随机模型的比较允许测量耦合强度和温度,从而全面表征系统。
英文摘要:
We realize a one-dimensional Josephson junction using quantum degenerate Bose gases in a tunable double well potential on an atom chip. Matter wave interferometry gives direct access to the relative phase field, which reflects the interplay of thermally driven fluctuations and phase locking due to tunneling. The thermal equilibrium state is characterized by probing the full statistical distribution function of the two-point phase correlation. Comparison to a stochastic model allows to measure the coupling strength and temperature and hence a full characterization of the system.
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