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Enhancing Robustness of Entanglement in Finite Temperature Environment Using Quantum Measurement Reversal

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Abstract

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.

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Acknowledgments

This work has been financially supported by NSFC (Grant Nos. U1204616, 61378011, 11374096), Program for ScienceTechnology Innovation Talents in Universities of Henan Province (Grant No. 2012HASTIT028), Program for Science and Technology Innovation Research Team in University of Henan Province (Grant No. 13IRTSTHN020).

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Authors and Affiliations

  1. Physics and Electronic Information College, Luoyang Normal University, Luoyang, 471022, Henan, People’s Republic of China

    Yao-Hua Hu & Yong-Gang Tan

  2. Vehicle and Transportation Engineering Institute, Henan University Of Science and Technology, Luoyang, 471013, Henan, People’s Republic of China

    Lei Tong

  3. College of Physics and Information Science, Hunan Normal University, Changsha, 410081, Hunan, People’s Republic of China

    Mao-Fa Fang

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  1. Yao-Hua Hu
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  2. Lei Tong
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  3. Yong-Gang Tan
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  4. Mao-Fa Fang
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Correspondence to Yao-Hua Hu.

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Hu, YH., Tong, L., Tan, YG. et al. Enhancing Robustness of Entanglement in Finite Temperature Environment Using Quantum Measurement Reversal. Int J Theor Phys 55, 1412–1422 (2016). https://doi.org/10.1007/s10773-015-2781-1

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  • DOI: https://doi.org/10.1007/s10773-015-2781-1

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