论文标题
在三维晶格中相互作用的鲜明定位动力学
Interacting Stark localization dynamics in a three-dimensional lattice Bose gas
论文作者
论文摘要
我们测量了由抛物线电位定位的晶格bose气体的热动力学。通过快速去除光屏障来产生非平衡的热密度分布。通过Mardia的$ B $统计数据解决了由此产生的时空动力学，这是对整个密度分布的形状敏感的量度。我们得出的结论是，对于我们采样的所有晶格电位深度，包括强烈相互作用和局部状态。但是，热化是缓慢且非指数的，最多需要500个隧道时间。我们表明，哈伯德$ u $项不负责与精确的对角线化计算进行比较，并且我们排除了通过改变激光波长而驱动的平衡。热化时间尺度与下一个最新的隧道时间相当，这表明可能需要连续的，强烈的相互作用理论来了解该系统中的浮雕。
We measure the thermalization dynamics of a lattice Bose gas that is Stark localized by a parabolic potential. A non-equilibrium thermal density distribution is created by quickly removing an optical barrier. The resulting spatio-temporal dynamics are resolved using Mardia's $B$ statistic, which is a measure sensitive to the shape of the entire density distribution. We conclude that equilibrium is achieved for all lattice potential depths that we sample, including the strongly interacting and localized regime. However, thermalization is slow and non-exponential, requiring up to 500 tunneling times. We show that the Hubbard $U$ term is not responsible for thermalization via comparison to an exact diagonalization calculation, and we rule out equilibration driven by lattice-light heating by varying the laser wavelength. The thermalization timescale is comparable to the next-nearest-neighbor tunneling time, which suggests that a continuum, strongly interacting theory may be needed to understand equlibration in this system.
