Quantum fluctuation in excited states of mesoscopic LC circuits at finite temperature

被引：12
|
作者：
Wang Ji-Suo
Fan Hong-Yi
Meng Xiang-Guo
机构：
[1] Department of Physics, Liaocheng University
来源：
CHINESE PHYSICS B | 2010年 / 19卷 / 03期
基金：
中国国家自然科学基金;
关键词：
quantization of LC circuits at finite temperature; coherent thermo state representation; thermo number state; thermo field dynamics; REPRESENTATION; EXCITATION; DYNAMICS;
D O I：
10.1088/1674-1056/19/3/034206
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We discuss quantum fluctuation in excited states (named thermo number states) of mesoscopic LC circuits at a finite temperature. By introducing the coherent thermo state into the thermo field dynamics pioneered by Umezawa and using the natural representation of thermo squeezing operator we can concisely derive the fluctuation. The result shows that the noise becomes larger when either temperature or the excitation number increases.
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页数：4
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