Quasi-long-range order in trapped systems
Quasi-long-range order in trapped systems
复制标题
俘获系统中的准长程有序
DOI：
10.1103/physreva.83.035602
复制
发表时间：
2010
影响因子：
2.9
通讯作者：
E. Vicari
中科院分区：
文献类型：
--
作者：
Federico Crecchi;E. Vicari
我们研究了囚禁空间相关势对具有U(1)对称性的二维粒子系统(如量子原子气体)低温准长程有序相的影响。我们利用标度变元刻画了陷阱大小依赖的普遍特征。经典二维XY模型的蒙特卡罗数值模拟结果支持这一设想，该模型具有与空间有关的跳跃参数，其不均匀性类似于原子气体实验中的囚禁势。
We investigate the effects of a trapping space-dependent potential on the low-temperature quasi-long-range order phase of two-dimensional particle systems with a relevant U(1) symmetry, such as quantum atomic gases. We characterize the universal features of the trap-size dependence using scaling arguments. The resulting scenario is supported by numerical Monte Carlo simulations of a classical two-dimensional XY model with a space-dependent hopping parameter, the inhomogeneity of which is analogous to that arising from the trapping potential in experiments of atomic gases.