Wolfgang Pauli Institute c/o Universität Wien, Nordbergstrasse 15, 1090 Vienna, Austria.
Phys Rev Lett. 2010 Jul 2;105(1):015301. doi: 10.1103/PhysRevLett.105.015301. Epub 2010 Jul 1.
We study the fluctuation properties of a one-dimensional many-body quantum system composed of interacting bosons and investigate the regimes where quantum noise or, respectively, thermal excitations are dominant. For the latter, we develop a semiclassical description of the fluctuation properties based on the Ornstein-Uhlenbeck stochastic process. As an illustration, we analyze the phase correlation functions and the full statistical distributions of the interference between two one-dimensional systems, either independent or tunnel-coupled, and compare with the Luttinger-liquid theory.
我们研究了由相互作用玻色子组成的一维多体量子系统的涨落特性，并研究了量子噪声或热激发占主导地位的区域。对于后者，我们基于 Ornstein-Uhlenbeck 随机过程发展了一种对涨落特性的半经典描述。作为说明，我们分析了两个一维系统之间的相位相关函数和干涉的全统计分布，这些系统是相互独立的或隧道耦合的，并与 Luttinger-liquid 理论进行了比较。
