Dissipation and decoherence in mean field theory

被引:60
作者
Habib, S
Kluger, Y
Mottola, E
Paz, JP
机构
[1] LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720
[2] UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,DEPT FIS,RA-1428 BUENOS AIRES,DF,ARGENTINA
关键词
D O I
10.1103/PhysRevLett.76.4660
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The time evolution of a closed system of mean fields and fluctuations is Hamiltonian, with the canonical variables parametrizing the general time-dependent Gaussian density matrix of the system. Yet, the evolution manifests both quantum decoherence and apparent irreversibility of energy flow from the coherent mean fields to fluctuating quantum modes. Using scalar QED as an example, we show how this collisionless damping and decoherence may be understood as the result of dephasing of the rapidly varying fluctuations and particle production in the time varying mean field.
引用
收藏
页码:4660 / 4663
页数:4
相关论文
共 12 条
[1]   QUANTUM-MECHANICAL PARAMETRIC AMPLIFICATION [J].
BROWN, LS ;
CARSON, LJ .
PHYSICAL REVIEW A, 1979, 20 (06) :2486-2497
[2]   NOISE AND FLUCTUATIONS IN SEMICLASSICAL GRAVITY [J].
CALZETTA, E ;
HU, BL .
PHYSICAL REVIEW D, 1994, 49 (12) :6636-6655
[3]   DISSIPATION OF QUANTUM-FIELDS FROM PARTICLE CREATION [J].
CALZETTA, E ;
HU, BL .
PHYSICAL REVIEW D, 1989, 40 (02) :656-659
[4]   NONEQUILIBRIUM QUANTUM-FIELDS IN THE LARGE-N EXPANSION [J].
COOPER, F ;
HABIB, S ;
KLUGER, Y ;
MOTTOLA, E ;
PAZ, JP ;
ANDERSON, PR .
PHYSICAL REVIEW D, 1994, 50 (04) :2848-2861
[5]  
HU BL, 1989, PHYS LETT B, V180, P329
[6]   PARTICLE NUMBER AND RANDOM PHASES [J].
KANDRUP, HE .
PHYSICAL REVIEW D, 1988, 38 (06) :1773-1779
[7]  
KANDRUP HE, 1988, PHYS REV D, V37, P3305
[8]   DECOHERENCE IN QUANTUM ELECTRODYNAMICS AND QUANTUM-GRAVITY [J].
KIEFER, C .
PHYSICAL REVIEW D, 1992, 46 (04) :1658-1670
[9]   PAIR PRODUCTION IN A STRONG ELECTRIC-FIELD [J].
KLUGER, Y ;
EISENBERG, JM ;
SVETITSKY, B ;
COOPER, F ;
MOTTOLA, E .
PHYSICAL REVIEW LETTERS, 1991, 67 (18) :2427-2430
[10]   NEW COHERENT STATES WITH APPLICATIONS TO TIME-DEPENDENT SYSTEMS [J].
RAJAGOPAL, AK ;
MARSHALL, JT .
PHYSICAL REVIEW A, 1982, 26 (05) :2977-2980