Universal thermometry for quantum simulation.
Universal thermometry for quantum simulation.
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用于量子模拟的通用测温法。
DOI：
10.1103/physrevlett.106.225301
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发表时间：
2009
影响因子：
8.6
通讯作者：
T. Ho
中科院分区：
文献类型：
--
作者：
Qi Zhou;T. Ho
量子模拟是冷原子研究中一项雄心勃勃的计划，目前正在世界各地的实验室中进行。目标是利用光学晶格中的冷原子来模拟未解决的强相关系统的模型，从而直接从实验数据中推断出它们的性质。这项工作的一个重要步骤是确定系统的温度，这对于推导所有热力学函数至关重要。然而，目前这一步对于点阵系统来说仍然很困难。在这里，我们提出了一种基于广义波动耗散定理的方法。它不依赖于数值模拟，并为包括混合物和旋量气体的量子气体系统提供通用测温方案，前提是局部密度近似有效。
Quantum simulation is a highly ambitious program in cold atom research currently being pursued in laboratories worldwide. The goal is to use cold atoms in optical lattices to simulate models for unsolved strongly correlated systems, so as to deduce their properties directly from experimental data. An important step in this effort is to determine the temperature of the system, which is essential for deducing all thermodynamic functions. This step, however, remains difficult for lattice systems at the moment. Here, we propose a method based on a generalized fluctuation-dissipation theorem. It does not rely on numerical simulations and gives a universal thermometry scheme for quantum gas systems including mixtures and spinor gases, provided that the local density approximation is valid.