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Protecting qutrit-qutrit entanglement by weak measurement and reversal

  • Xing XiaoEmail author
  • Yan-Ling Li
Regular Article

Abstract

Entangled states in high dimensional systems are of great interest due to the extended possibilities they provide in quantum information processing. Recently, Sun et al. [Phys. Rev. A 82, 052323 (2010)] and Kim et al. [Nat. Phys. 8, 117 (2012)] pointed out that weak measurement and quantum weak measurement reversal can actively combat decoherence. We generalize their studies from qubits to qutrits under amplitude damping decoherence. We find that the qutrit-qutrit entanglement can be partially retrieved for certain initial states when only weak measurement reversals are performed. However, we can completely defeat amplitude damping decoherence for any initial states by the combination of prior weak measurements and post optimal weak measurement reversals. The experimental feasibility of our schemes is also discussed.

Keywords

Quantum Information 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.College of Physics and Electronic Information, Gannan Normal UniversityGanzhouP.R. China
  2. 2.Institute of Optoelectronic Materials and Technology, Gannan Normal UniversityGanzhouP.R. China
  3. 3.School of Information Engineering, Jiangxi University of Science and TechnologyGanzhouP.R. China

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