Abstract
In this paper, quantum correlation (QC) swapping for certain separable two-qubit mixed states is treated. A QC quantifier, measurement-induced disturbance (MID) (Luo in Phys Rev A 77:022301, 2008), is employed to characterize and quantify QCs in the relevant states. Properties of all QCs in the swapping process are revealed. Particularly, it is found that MID can be increased through QC swapping for certain separable two-qubit mixed states.
Highlights
In 2001, Ollivier and Zurek [1] exposed a surprising feature that there exist quantum correlations (QCs) in some separable states, where it is obvious that quantum entanglements do not occur
The two initial states we considered are separable two-qubit mixed states
In this paper, we have considered QC swapping with separable twoqubit mixed states as the initial states
Summary
In 2001, Ollivier and Zurek [1] exposed a surprising feature that there exist quantum correlations (QCs) in some separable states, where it is obvious that quantum entanglements do not occur This distinct phenomenon started a new era. The motivations in our study are fourfold: (1) To find whether quantum correlation swapping can be realized through separable two-qubit mixed states. Through concrete investigations in the following study, we will show the following essential results: (a) Quantum correlation swapping can be realized through separable two-qubit mixed states; (b) some distinct characteristics of the quantum correlation in the final states after quantum swapping can be obtained; (c) in the special. QC swapping case, the long-distance shared QCBE can be realized and increased.
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