Quantum correlation dynamics of two qubits in noisy environments: The factorization law and beyond
- Department of Physics, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 (China)
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
We investigate the quantum correlations of two qubits under conditions of single-sided and two-sided noisy channels when the initial state of the system belongs to a subclass of X structured ones in terms of measurement-induced nonlocality, measurement-induced disturbance and quantum discord. The results show that measurement-induced nonlocality has a factorization law, regardless of whether there are single-sided or two-sided noisy channels. However, there is no simple factorization relation for measurement-induced disturbance and quantum discord. Also, we compare the evolution of these quantum correlations as functions of time. For the four Bell initial states, we find that the measurement-induced disturbance evolution equations are the same when the channel is single-sided, but they will be divided into two categories when the channel is two-sided. Quantum correlations decay more quickly when the channel is two-sided. Furthermore, quantum discord presents sudden change in the derivative of its time evolution. - Highlights: Black-Right-Pointing-Pointer The quantum correlation dynamics of two qubits under noisy environmental conditions is investigated. Black-Right-Pointing-Pointer Measurement-induced nonlocality has a factorization law, regardless of whether there are single-sided or two-sided noisy channels. Black-Right-Pointing-Pointer There is no simple factorization relation for measurement-induced disturbance and quantum discord.
- OSTI ID:
- 22157037
- Journal Information:
- Annals of Physics (New York), Vol. 327, Issue 9; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-4916
- Country of Publication:
- United States
- Language:
- English
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