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Hu, Yao-Hua; Tong, Lei; Tan, Yong-Gang; Fang, Mao-Fa

Enhancing robustness of entanglement in finite temperature environment using quantum measurement reversal. (English) Zbl 1338.81052

Int. J. Theor. Phys. 55, No. 3, 1412-1422 (2016).
Summary: We demonstrate methods of enhancing robustness of entanglement of two-qubit systems undergoing generalized amplitude damping decoherence using weak measurement and measurement reversal. The results show that the local action of generalized amplitude damping noise can cause sudden death of entanglement, and the weak measurement and measurement reversal is useful for combating generalized amplitude damping decoherence and recovering the entanglement of two entangled qubits. In addition, the results indicate that it would be much more easily implemented by applying quantum measurement reversal on a single-qubit to enhance robustness of entanglement in finite temperature environment, than on both qubits.

Cited in 1 Document

MSC:

81P40 Quantum coherence, entanglement, quantum correlations
81S22 Open systems, reduced dynamics, master equations, decoherence

Keywords:

entanglement protection; generalized amplitude damping; weak measurement; measurement reversal
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