利用量子正则系综理论研究介观电路的量子效应  

Quantum Canonic Ensemble Theory for Quantum Effects of Mesoscopic Circuit

作　　者：李玉山[1] 

机构地区：[1]菏泽学院物理系,山东菏泽274015

出　　处：《河北师范大学学报（自然科学版）》2010年第1期42-45,共4页Journal of Hebei Normal University：Natural Science

基　　金：河南省教育厅自然科学基金(2007140008);菏泽学院自然科学基金(XY07WL01)

摘　　要：利用量子正则系综理论研究了介观RLC串联电路在能量混合态下的电荷、磁通(电流)的量子涨落,得到了在能量混合态下电路的量子涨落与温度的关系.结果表明,介观RLC串联电路中的量子涨落不仅与本征频率有关,而且与温度有关;温度越高,电路中的量子噪音越大.该结论与目前采用热场动力学理论方法(TFD)所得结果相一致,量子正则系综理论的方法更易理解和应用.By using of the quantum canonic ensemble theory,the quantum effects of mesoscopic RLC series circuit have been studied in the energy mixed eigenstates.The relation between the quantum effects of mesoscopic circuit and the temperature has been obtained.The results show that the quantum fluctuations of mesoscopic RLC series circuit are not only related to engenfrequency of the circuit,but also the temperature.The quantum noise grows up with the temperature.This result agrees with that obtained by thermal field dynamics（TFD） .However the quantum canonic ensemble theory is easily understood and applied.

关 键 词：正则系综理论 介观电路 混合态 量子涨落 

分 类 号：O431.2[机械工程—光学工程]