Quantum fluctuation in excited states of mesoscopic LC circuits at finite temperature
Ji‐Suo Wang, Fan Hong‐Yi, Meng Xiang-Guo
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.
Chinese Physics B•Mar 1, 2010•12 citations