期刊
NEW JOURNAL OF PHYSICS
卷 12, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/12/8/083046
关键词
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资金
- Fondazione Carical
- Irish Research Council for Science, Engineering and Technology
- EPSRC [EP/G004579/1]
- British Council/MIUR
- EPSRC [EP/G004579/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G004579/1] Funding Source: researchfish
We study the dynamical behavior of two initially entangled qubits, each locally coupled to an environment embodied by an interacting spin chain. We consider energy-exchange qubit-environment couplings resulting in rich and highly non-trivial entanglement dynamics. We obtain exact results for the time evolution of the concurrence between the two qubits and find that, by tuning the interaction parameters, one can freeze the dynamics of entanglement, therefore inhibiting their relaxation into the spin environments, as well as activate a sudden-death phenomenon. We also discuss the effects of an environmental quantum phase transition on the features of the two-qubit entanglement dynamics.
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