Counter-rotating terms suppress revived three-qubit entanglement in strong coupling but enhance genuine tripartite nonlocality in the ultrastrong regime, while nonlocality transfers back and forth between the three-qubit state and a two-qubit subsystem.
Quantum Zeno Effect on Genuine Tripartite Nonlocality and Entanglement in Quantum Dissipative System
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abstract
As a precious global resource in quantum information, genuine tripartite nonlocality(GTN) can be quantified by violating Svetlichny inequality. However, there is still no analytical expression for the general three-qubit states due to the difficulty of theoretical calculations. In this paper, we achieve highly accurate quantization of GTN for arbitrary three-qubit quantum states numerically. As an example, we study the dynamics of GTN and genuine tripartite entanglement(GTE) for the W state. Moreover, the complementarity of GTN is verified by examining the nonlocality between the tripartite and the bipartite. Finally, we also find a useful strategy to protect the correlation of GTN and GTE under decoherence by utilizing the Zeno effect.
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quant-ph 1years
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The transfer of nonlocality between two- and three-qubit dissipative systems with counter-rotating-wave terms
Counter-rotating terms suppress revived three-qubit entanglement in strong coupling but enhance genuine tripartite nonlocality in the ultrastrong regime, while nonlocality transfers back and forth between the three-qubit state and a two-qubit subsystem.