Optimizing quantum correlation dynamics by weak measurement in dissipative environment
We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and mea...
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| Published in | Chinese physics B Vol. 24; no. 4; pp. 221 - 226 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.04.2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 1741-4199 |
| DOI | 10.1088/1674-1056/24/4/044205 |
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| Abstract | We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and meanwhile it can reduce the occurrence time of entanglement sudden death （ESD） in the process of time evolution. In a Markovian environment, the quantum entanglements of the two kinds of initial states decay rapidly and the weak measurement can further weaken the quantum entanglement, therefore in this case the entanglement cannot be optimized in the evolution process. |
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| AbstractList | We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and meanwhile it can reduce the occurrence time of entanglement sudden death （ESD） in the process of time evolution. In a Markovian environment, the quantum entanglements of the two kinds of initial states decay rapidly and the weak measurement can further weaken the quantum entanglement, therefore in this case the entanglement cannot be optimized in the evolution process. We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and meanwhile it can reduce the occurrence time of entanglement sudden death (ESD) in the process of time evolution. In a Markovian environment, the quantum entanglements of the two kinds of initial states decay rapidly and the weak measurement can further weaken the quantum entanglement, therefore in this case the entanglement cannot be optimized in the evolution process. |
| Author | 杜少将 夏云杰 段德洋 张路 高强 |
| AuthorAffiliation | Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China Department of Physics and Information Engineering, Jining University, Qufu 273155, China |
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| Cites_doi | 10.1103/PhysRevLett.109.150402 10.1103/PhysRevLett.99.160502 10.1103/PhysRevA.86.012325 10.1103/PhysRevLett.101.080503 10.1103/PhysRevLett.88.017901 10.1103/PhysRevA.86.052322 10.1103/PhysRevLett.93.140404 10.1103/PhysRevA.74.063826 10.1103/PhysRevA.81.052107 10.1103/PhysRevLett.60.1351 10.1103/PhysRevA.84.042313 10.1103/PhysRevLett.97.140403 10.1103/PhysRevA.87.012110 10.1103/PhysRevLett.109.020408 10.1103/PhysRevA.77.032342 10.1364/JOSAB.29.002060 10.1103/PhysRevA.84.052116 10.1103/PhysRevA.81.042105 10.1103/PhysRevA.82.052323 10.3788/AOS 10.1142/S0217979213450537 10.1142/S0219749911008283 10.1103/PhysRevA.87.012101 |
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| Notes | quantum entanglement, quantum correlation, entanglement sudden death, weak measurement We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and meanwhile it can reduce the occurrence time of entanglement sudden death （ESD） in the process of time evolution. In a Markovian environment, the quantum entanglements of the two kinds of initial states decay rapidly and the weak measurement can further weaken the quantum entanglement, therefore in this case the entanglement cannot be optimized in the evolution process. 11-5639/O4 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| References | 24 25 D’Arrigo A (17) 2012 26 27 28 29 Wang X Y (23) 2013; 22 Guo Y N (21) 2014; 23 Fan Z L (20) 2014; 23 30 10 11 12 13 14 15 16 18 Wang X Y (22) 2013; 22 1 2 Petruccione F (5) 2002 3 4 6 7 8 9 Liu X (19) 2014; 23 |
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| Snippet | We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak... |
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| SubjectTerms | Correlation analysis Dissipation Entanglement Evolution Markov processes Optimization Quantum mechanics Qubits (quantum computing) 关联动力学 初始状态 耗散 软测量 过程优化 量子相关性 量子纠缠 马尔可夫环境 |
| Title | Optimizing quantum correlation dynamics by weak measurement in dissipative environment |
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