Quantum Correlations in a Two-Qubit Heisenberg XX Model under Intrinsic Decoherence |
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| Authors: | QIU Liang |
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| Affiliation: | College of Sciences, China University of Mining and Technology, Xuzhou 221116, China |
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| Abstract: | ![]()
Taking into account the intrinsic decoherence, we have investigated quantum correlations in a two-qubit Heisenberg XX model when a nonuniform magnetic field is included. We compare entanglement measured by entanglement of formation, quantum discord and measurement-induced measurement (MID) and illustrate their different characteristics. Quantum discord and MID show the same features and always exist even though there is no entanglement in the long time limit. In the time evolution, quantum discord could be generated or enhanced to the stable value, while MID just decreases to the stable value. |
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| Keywords: | entanglement of formation quantum discord measurement-induced decoherence |
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