Decoherence of Josephson charge qubit in non-Markovian environment

被引：1

作者：

Qiu, Qing-Qian

Zhou, Xing-Fei

Liang, Xian-Ting ^{[1
]}

机构：

[1] Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2016年 / 489卷

关键词：

Decoherence; Non-Markov; Josephson charge qubit; Time-nonlocal dynamics; MACROSCOPIC QUANTUM STATES; COOPER-PAIR BOX; DISSIPATIVE SYSTEMS; LONG-TIME; DYNAMICS; JUNCTION; OSCILLATIONS; EVOLUTION;

D O I：

10.1016/j.physb.2016.02.024

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this paper we investigate the decoherence of Josephson charge qubit (JCQ) by using a time-nonlocal (TNL) dynamical method. Three kinds of environmental models, described with Ohmic, super-Ohmic, and sub-Ohmic spectral density functions are considered. It is shown that the TNL method can effectively include the non-Markovian effects in the dynamical solutions. In particular, it is shown that the sub Ohmic environment has longer correlation time than the Ohmic and super-Ohmic ones. And the Markovian and non-Markovian dynamics are obviously different for the qubit in sub-Ohmic environment. (C) 2016 Elsevier B.V. All rights reserved.

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页码：12 / 16

页数：5

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共 30 条

[1] Quantum Decoherence of Charge Qubit Coupled to Nonlinear Nanomechanical Resonator [J].

Chen Cheng ;

Gao Yi-Bo .

COMMUNICATIONS IN THEORETICAL PHYSICS, 2013, 60 (05) :531-534

[2] Simulation of the two-dimensional electronic spectra of the Fenna-Matthews-Olson complex using the hierarchical equations of motion method [J].

Chen, Liping ;

Zheng, Renhui ;

Jing, Yuanyuan ;

Shi, Qiang .

JOURNAL OF CHEMICAL PHYSICS, 2011, 134 (19)

[3] Photosynthetic electron transfer controlled by protein relaxation: Analysis by Langevin stochastic approach [J].

Cherepanov, DA ;

Krishtalik, LI ;

Mulkidjanian, AY .

BIOPHYSICAL JOURNAL, 2001, 80 (03) :1033-1049

[4] Coherent quantum dynamics of a superconducting flux qubit [J].

Chiorescu, I ;

Nakamura, Y ;

Harmans, CJPM ;

Mooij, JE .

SCIENCE, 2003, 299 (5614) :1869-1871

[5] Quantum state transfer with a two-dimensional Cooper-pair box qubit array [J].

Feng, Zhi-Bo ;

Yan, Run-Ying ;

Zhou, Yun-Qing .

QUANTUM INFORMATION PROCESSING, 2013, 12 (03) :1429-1438

[6] DYNAMICS OF THE DISSIPATIVE 2-STATE SYSTEM [J].

LEGGETT, AJ ;

CHAKRAVARTY, S ;

DORSEY, AT ;

FISHER, MPA ;

GARG, A ;

ZWERGER, W .

REVIEWS OF MODERN PHYSICS, 1987, 59 (01) :1-85

[7] Reduced quantum dynamics with arbitrary bath spectral densities: Hierarchical equations of motion based on several different bath decomposition schemes [J].

Liu, Hao ;

Zhu, Lili ;

Bai, Shuming ;

Shi, Qiang .

JOURNAL OF CHEMICAL PHYSICS, 2014, 140 (13)

[8] PATH-INTEGRALS FOR DISSIPATIVE SYSTEMS BY TENSOR MULTIPLICATION - CONDENSED-PHASE QUANTUM DYNAMICS FOR ARBITRARILY LONG-TIME [J].

MAKAROV, DE ;

MAKRI, N .

CHEMICAL PHYSICS LETTERS, 1994, 221 (5-6) :482-491

[9] Quantum-state engineering with Josephson-junction devices [J].

Makhlin, Y ;

Schön, G ;

Shnirman, A .

REVIEWS OF MODERN PHYSICS, 2001, 73 (02) :357-400

[10] Josephson-junction qubits with controlled couplings [J].

Makhlin, Y ;

Schön, G ;

Shnirman, A .

NATURE, 1999, 398 (6725) :305-307