Entropy Exchange in Coupled Field-Superconducting Charge Qubit System with Intrinsic Decoherence  

作　　者：邵彬 张剑 邹健 

机构地区：[1]School of Science, Beijing Institute of Technology, Beijing 100081, China

出　　处：《Journal of Beijing Institute of Technology》2006年第4期496-499,共4页北京理工大学学报（英文版）

基　　金：the National Natural Science Foundation of China(10374007 ,60472021)

摘　　要：Based on the intrinsic decoherence effect, partial entropy properties of a superconducting charge qubit inside a single-mode cavity field is investigated, and entropy exchange which is recently regarded as a kind of anti-correlated behavior of the entropy between subsystems is explored. Our results show that although the intrinsic decoherence leads to an effective irreversible evolution of the interacting system due to a suppression of coherent quantum features through the decay of off-diagonal matrix elements of the density operator and has an apparently influence on the partial entropy of two individual subsystems, it does not effect the entropy exchange between the two subsystems.Based on the intrinsic decoherence effect, partial entropy properties of a superconducting charge qubit inside a single-mode cavity field is investigated, and entropy exchange which is recently regarded as a kind of anti-correlated behavior of the entropy between subsystems is explored. Our results show that although the intrinsic decoherence leads to an effective irreversible evolution of the interacting system due to a suppression of coherent quantum features through the decay of off-diagonal matrix elements of the density operator and has an apparently influence on the partial entropy of two individual subsystems, it does not effect the entropy exchange between the two subsystems.

关 键 词：intrinsic decoherence entropy exchange charge qubit 

分 类 号：O413[理学—理论物理]