Infinite density for cold atoms in shallow optical lattices
Infinite density for cold atoms in shallow optical lattices
复制标题
DOI：
10.1209/0295-5075/109/23001
复制
发表时间：
2013-10
期刊：
影响因子：
--
通讯作者：
P. Holz;A. Dechant;E. Lutz
中科院分区：
文献类型：
--
作者：
P. Holz;A. Dechant;E. Lutz
无穷大密度是一种不可归一化的准概率分布，它可以描述系统在遍历性被破坏和平衡Boltzmann-Gibbs分布失效时的长时间性质。他们的实验观察至今仍是难以捉摸的。在这里，我们进行半经典Monte Carlo模拟的冷原子在耗散光学晶格与现实的参数。我们发现，动量无穷大密度，以及它的标度不变性，应该是可观察到的浅势。我们进一步评估的动量自相关函数在平稳和非平稳，老化制度。
Infinite densities are non-normalizable quasi-probability distributions that can describe the long-time properties of systems when ergodicity is broken and the equilibrium Boltzmann-Gibbs distribution fails. Their experimental observation has remained elusive so far. We here perform semiclassical Monte Carlo simulations of cold atoms in dissipative optical lattices with realistic parameters. We show that the momentum infinite density, as well as its scale invariance, should be observable in shallow potentials. We further evaluate the momentum autocorrelation function both in the stationary and nonstationary, aging regime.