Logarithmic Oscillators: Ideal Hamiltonian Thermostats

被引：22

作者：

Campisi, Michele ^{[1
]}

Zhan, Fei ^{[1
]}

Talkner, Peter ^{[1
]}

Haenggi, Peter ^{[1
]}

机构：

[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 25期

关键词：

DYNAMICS; TEMPERATURE; EQUATION;

D O I：

10.1103/PhysRevLett.108.250601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A logarithmic oscillator (in short, log-oscillator) behaves like an ideal thermostat because of its infinite heat capacity: When it weakly couples to another system, time averages of the system observables agree with ensemble averages from a Gibbs distribution with a temperature T that is given by the strength of the logarithmic potential. The resulting equations of motion are Hamiltonian and may be implemented not only in a computer but also with real-world experiments, e.g., with cold atoms.

引用

页数：5

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