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arXiv 1011.4563cond-mat.stat-mechcond-mat.quant-gas
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囚禁系统中的准长程序

Quasi-long-range order in trapped systems

Federico Crecchi, Ettore Vicari

摘要:

研究了囚禁空间势对具有U(1)对称性的二维粒子系统(如量子原子气体)的低温准长程序相的影响.我们使用缩放参数的陷阱大小依赖的普遍特征。由此产生的情况下支持的数值蒙特卡罗模拟的经典二维XY模型与空间相关的跳跃参数,其不均匀性是类似的原子气体的实验中所产生的捕获势。

英文摘要:

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 whose inhomogeneity is analogous to that arising from the trapping potential in experiments of atomic gases.

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