Dynamics of entanglement in one-dimensional Ising chains with two- and three-body interactions |
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Authors: | Y Z Wu C H Shi X Hao T Pan and X F Jiang |
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Institution: | (1) Jiangsu Laboratory of Advanced Functional materials, Changshu Institute of Technology, 215500, Changshu, P.R. China;(2) School of Science, Suzhou University of Science and Technology, 215009, Suzhou, P.R. China;(3) Department of Physics, Soochow University, 215006, Suzhou, P.R. China |
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Abstract: | The evolution of entanglement in a one-dimensional Ising chain with both two-body and three-body interactions, under two types
of initial states, is numerically simulated. We analyse three problems concerning the dynamics of pairwise entanglement: (i)
the possibility of generating large entanglement from an initial separable state by the use of a selective irradiation scheme;
(ii) the effect of three-body interaction on the generation of entanglement from an initial separable state; (iii) the effect
of three-body interaction on the decay of the entanglement from a state with only (m,n)-pair maximal entangled, and the rest
in product form. It is shown that a large pairwise concurrence Cmn can be obtained when the resonant, transverse radio-frequency fields are selectively switched on from the mth to nth spins.
Three-body interaction will decrease the oscillation amplitude of the nearest neighbour concurrence, while the oscillation
amplitude of remote pairwise concurrence will be greatly increased with the consideration of three-body interactions. For
an initial (m,n)-pair maximal entangled state, a slow decay of the pairwise concurrence Cmn is found with the introduction of three-body interactions. |
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Keywords: | PACS" target="_blank">PACS 03 67 Mn Entanglement measures witnesses and other characterizations 03 65 Ud Entanglement and quantum nonlocality 76 60 -k Nuclear magnetic resonance and relaxation |
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