On the speed of fluctuations around thermodynamic equilibrium
On the speed of fluctuations around thermodynamic equilibrium
复制标题
关于热力学平衡附近波动的速度
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Winter
中科院分区：
文献类型：
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作者：
N. Linden;S. Popescu;A. J. Short;A. Winter
我们研究了量子系统围绕其平衡态的涨落速度，结果表明，在典型的热力学情况下，涨落速度几乎在任何时候都是非常小的。这提出了一种关于热平衡的性质，特别是关于热起伏的起源的另一种观点。我们认为，平衡不是系统在时间上主动波动的动态过程，而是由于本质上静态的量子不确定性造成的。
We study the speed of fluctuations of a quantum system around its equilibrium state, and show that the speed is extremely small at almost all times in typical thermodynamic cases. This suggests an alternative view on the nature of thermal equilibrium and, in particular, of the origin of thermal fluctuations. We argue that instead of equilibrium being a dynamical process in which the system actively fluctuates in time, the fluctuations are due to quantum uncertainties in an essentially static state.