QUANTUM DISSIPATION

被引：228

作者：

CELEGHINI, E

RASETTI, M

VITIELLO, G

机构：

[1] IST NAZL FIS NUCL, FLORENCE, ITALY

[2] POLITECN TORINO, DIPARTIMENTO FIS, I-10128 TURIN, ITALY

[3] POLITECN TORINO, UNITA INFM, I-10128 TURIN, ITALY

[4] IST NAZL FIS NUCL, NAPLES, ITALY

[5] UNIV SALERNO, DIPARTIMENTO FIS, I-84100 SALERNO, ITALY

来源：

ANNALS OF PHYSICS | 1992年 / 215卷 / 01期

关键词：

D O I：

10.1016/0003-4916(92)90302-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discuss some aspects of dissipation in quantum field theory starting from the example of the quantum mechanical damped harmonic oscillator. We show that the set of states of the system splits into unitarily inequivalent representations of the canonical commutation relations. At quantum level the irreversibility of time evolution is expressed as tunneling among the unitarily inequivalent representations. Statistical and thermodynamical properties of the formalism are analysed and canonical quantization is shown to lead to time dependent SU(1, 1) coherent states, well known in high energy physics as well as in quantum optics and thermal field theory. © 1992.

引用

页码：156 / 170

页数：15

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