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International Journal of Theoretical Physics

, Volume 58, Issue 6, pp 2033–2042 | Cite as

Protecting Qutrit-Qutrit Entanglement Under the Generalized Amplitude Decoherence of the Finite Temperature

  • MeiJiao Wang
  • Yunjie XiaEmail author
Article

Abstract

We investigate the dynamics and protection of quantum entanglement of a qutrit-qutrit system under local amplitude damping channels with finite temperature. We consider two different initial states. We find that the qutrit-qutrit entanglement decays monotonically as the decoherence strength increases, and may go through entanglement sudden death at higher temperature. Special attention is paid to how to protect the quantum entanglement from decoherence by weak measurement and quantum measurement reversal. Our results show that the entanglement increases with the increase of weak measurement strength when the temperature is lower. However, the protections of entanglement by weak measurement and quantum measurement reversal are almost failed and the decays of entanglement goes up with the increase of weak measurement strength for different decoherence strength when the temperature is higher, even entanglement suffers sudden death.

Keywords

Quantum entanglement Weak measurement and measurement reversal The generalized amplitude damping Negativity 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China Grant Nos. 61675115, 11704221.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Physics and EngineeringQufu Normal UniversityQufuChina
  2. 2.Shandong Provincial Key Laboratory of Laser Polarization and Information TechnologyQufu Normal UniversityQufuChina

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