Decoherence in quantum systems

被引：4
作者：
O'Connell, RF [1 ]
机构：
[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
来源：
IEEE TRANSACTIONS ON NANOTECHNOLOGY | 2005年 / 4卷 / 01期
关键词：
decoherence; dissipation; quantum information; Wigner distribution;
D O I：
10.1109/TNANO.2004.840158
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We discuss various definitions of decoherence and how it can be measured. We compare and contrast decoherence in quantum systems with an infinite number of eigenstates (such as the free particle and the oscillator) and spin systems. In the former case, we point out the essential difference between assuming "entanglement at all times" and entanglement with the reservoir occuring at some initial time. We also discuss optimum calculational techniques in both arenas.
引用
收藏
页码：77 / 82
页数：6
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