One-way Quantum Deficit and Decoherence for Two-qubit X States

被引:18
作者
Ye, Biao-Liang [1 ]
Wang, Yao-Kun [2 ,3 ]
Fei, Shao-Ming [1 ,4 ]
机构
[1] Capital Normal Univ, Sch Math Sci, Beijing 100048, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[3] Tonghua Normal Univ, Coll Math, Tonghua 134001, Jilin, Peoples R China
[4] Max Planck Inst Math Sci, D-04103 Leipzig, Germany
关键词
One-way quantum deficit; Two-qubit X states; Decoherence; DISCORD; ENTANGLEMENT;
D O I
10.1007/s10773-015-2862-1
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study one-way quantum deficit of two-qubit X states systematically from analytical derivations. An effective approach to compute one-way quantum deficit of two-qubit X states has been provided. Analytical results are presented as for detailed examples. Moreover, we demonstrate the decoherence of one-way quantum deficit under phase damping channel.
引用
收藏
页码:2237 / 2246
页数:10
相关论文
共 37 条
[1]   Quantum versus Classical Correlations in Gaussian States [J].
Adesso, Gerardo ;
Datta, Animesh .
PHYSICAL REVIEW LETTERS, 2010, 105 (03)
[2]   Quantum discord for two-qubit X states [J].
Ali, Mazhar ;
Rau, A. R. P. ;
Alber, G. .
PHYSICAL REVIEW A, 2010, 81 (04)
[3]   Entanglement in many-body systems [J].
Amico, Luigi ;
Fazio, Rosario ;
Osterloh, Andreas ;
Vedral, Vlatko .
REVIEWS OF MODERN PHYSICS, 2008, 80 (02) :517-576
[4]   Operational interpretations of quantum discord [J].
Cavalcanti, D. ;
Aolita, L. ;
Boixo, S. ;
Modi, K. ;
Piani, M. ;
Winter, A. .
PHYSICAL REVIEW A, 2011, 83 (03)
[5]   Quantum discord of two-qubit X states [J].
Chen, Qing ;
Zhang, Chengjie ;
Yu, Sixia ;
Yi, X. X. ;
Oh, C. H. .
PHYSICAL REVIEW A, 2011, 84 (04)
[6]  
Chuang I. N., 2000, Quantum Computation and Quantum Information
[7]  
Dakic B, 2012, NAT PHYS, V8, P666, DOI [10.1038/NPHYS2377, 10.1038/nphys2377]
[8]   Necessary and Sufficient Condition for Nonzero Quantum Discord [J].
Dakic, Borivoje ;
Vedral, Vlatko ;
Brukner, Caslav .
PHYSICAL REVIEW LETTERS, 2010, 105 (19)
[9]   Quantum discord and the power of one qubit [J].
Datta, Animesh ;
Shaji, Anil ;
Caves, Carlton M. .
PHYSICAL REVIEW LETTERS, 2008, 100 (05)
[10]   Orthogonal measurements are almost sufficient for quantum discord of two qubits [J].
Galve, F. ;
Giorgi, G. L. ;
Zambrini, R. .
EPL, 2011, 96 (04)