Effect of feedback on the decoherence of a Schrodinger-cat state: A quantum trajectory description

被引：53

作者：

Goetsch, P

Tombesi, P

Vitali, D

机构：

[1] UNIV CAMERINO, DIPARTIMENTO MATEMAT & FIS, I-62032 CAMERINO, ITALY

[2] IST NAZL FIS MAT, CAMERINO, ITALY

来源：

PHYSICAL REVIEW A | 1996年 / 54卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.54.4519

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The linear stochastic Schrodinger equation of a cavity mode subject to a homodyne measurement and to a phase-sensitive feedback loop realized with part of the output homodyne photocurrent is derived. We show that quantum feedback has stabilizing effects which manifest themselves in a significant retardation of the decoherence of a Schrodinger-cat state.

引用

页码：4519 / 4527

页数：9

共 34 条

[1] NONDEMOLITION OBSERVATION OF A FREE QUANTUM PARTICLE [J].

BELAVKIN, VP ;

STASZEWSKI, P .

PHYSICAL REVIEW A, 1992, 45 (03) :1347-1356

[2] MANIPULATION OF PHOTONS IN A CAVITY BY DISPERSIVE ATOM-FIELD COUPLING - QUANTUM-NONDEMOLITION MEASUREMENTS AND GENERATION OF SCHRODINGER CAT STATES [J].

BRUNE, M ;

HAROCHE, S ;

RAIMOND, JM ;

DAVIDOVICH, L ;

ZAGURY, N .

PHYSICAL REVIEW A, 1992, 45 (07) :5193-5214

[3] DENSITY OPERATORS AND QUASIPROBABILITY DISTRIBUTIONS [J].

CAHILL, KE ;

GLAUBER, RJ .

PHYSICAL REVIEW, 1969, 177 (5P1) :1882-+

[4] INFLUENCE OF DAMPING ON QUANTUM INTERFERENCE - AN EXACTLY SOLUBLE MODEL [J].

CALDEIRA, AO ;

LEGGETT, AJ .

PHYSICAL REVIEW A, 1985, 31 (02) :1059-1066

[5]

CARMICHAEL HJ, 1993, LECT NOTES PHYSICS, V18

[6] SIMPLE CAVITY-QED 2-BIT UNIVERSAL QUANTUM LOGIC GATE - THE PRINCIPLE AND EXPECTED PERFORMANCES [J].

DOMOKOS, P ;

RAIMOND, JM ;

BRUNE, M ;

HAROCHE, S .

PHYSICAL REVIEW A, 1995, 52 (05) :3554-3559

[7] Can quantum-mechanical description of physical reality be considered complete? [J].

Einstein, A ;

Podolsky, B ;

Rosen, N .

PHYSICAL REVIEW, 1935, 47 (10) :0777-0780

[8]

EKERT A, 1995, AIP C P, V323

[9]

Gardiner C., 2010, Quantum Noise

[10] MARKOV-PROCESSES IN HILBERT-SPACE AND CONTINUOUS SPONTANEOUS LOCALIZATION OF SYSTEMS OF IDENTICAL PARTICLES [J].

GHIRARDI, GC ;

PEARLE, P ;

RIMINI, A .

PHYSICAL REVIEW A, 1990, 42 (01) :78-89

← 1 2 3 4 →