Quantum master equation approach to dynamical suppression of decoherence

被引：8

作者：

Ban, Masashi

Kitajima, Sachiko

Shibata, Fumiaki

机构：

[1] Ochanomizu Univ, Grad Sch Humanities & Sci, Bunkyo Ku, Tokyo 1128610, Japan

[2] Japan Sci & Technol Agcy, Core Res Evolut Sci & Technol, Chuo Ku, Tokyo 1030028, Japan

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2007年 / 40卷 / 13期

关键词：

ENTANGLEMENT; SYSTEMS;

D O I：

10.1088/0953-4075/40/13/009

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An irreversible time evolution of a quantum system interacting with a surrounding environment is described by a quantum master equation. When an external field is applied to a quantum system, a non-Markovian master equation is derived in a rigorousway, where the relaxation terms in the quantum master equation include the effect of the external field that is ignored in the conventional treatment. It is shown that when the external field is a sequence of phase-modulation pi-pulses, the decoherence of the quantum system can be suppressed. In particular, when the pulse separation is sufficiently short in comparison with the correlation time of the environmental system, dynamical decoupling takes place. To see the effect of the phase-modulation pi-pulses, the time evolution of qubit entanglement is investigated in detail.

引用

页码：2641 / 2651

页数：11

共 29 条

[1] CORRECTION TO THE LASER MASTER EQUATION [J].

ARIMITSU, T .

PHYSICA A, 1980, 104 (1-2) :126-142

[2] GENERAL FORMULATION FOR OPEN SYSTEMS - MIRROR OPERATION [J].

ARIMITSU, T .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1982, 51 (06) :1720-1726

[3] RIGOROUS TREATMENT OF THE DAMPING THEORY FOR COUPLED SYSTEMS IN CONTACT WITH RESERVOIRS - PARAMETRIC-AMPLIFIER [J].

ARIMITSU, T ;

TAKAHASHI, Y ;

SHIBATA, F .

PHYSICA A, 1980, 100 (03) :507-539

[4] Decoherence of quantum information in the non-Markovian qubit channel [J].

Ban, M ;

Kitajima, S ;

Shibata, F .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 2005, 38 (32) :7161-7174

[5]

Bennett CH, 1996, PHYS REV A, V54, P3824, DOI 10.1103/PhysRevA.54.3824

[6]

BRAUSNTEIN SL, 2003, QUANTUM INFORM CONTI

[7]

CHATURVEDI S, 1979, Z PHYS B, V35, P279

[8] Dynamical suppression of telegraph and 1/f noise due to quantum bistable fluctuators -: art. no. 040101 [J].

Falci, G ;

D'Arrigo, A ;

Mastellone, A ;

Paladino, E .

PHYSICAL REVIEW A, 2004, 70 (04) :040101-1

[9]

Gardiner C. W., 2000, Quantum noise: a handbook of Markovian and non-Markovian quantum stochastic methods with applications to quantum optics, Springer series in synergetics

[10]

Haake F., 1973, STAT TREATMENT OPEN

← 1 2 3 →