English

Protecting qutrit-qutrit entanglement by weak measurement and reversal

Quantum Physics 2017-07-03 v2

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

Cite

@article{arxiv.1311.4692,
  title  = {Protecting qutrit-qutrit entanglement by weak measurement and reversal},
  author = {Xing Xiao and Yan-Ling Li},
  journal= {arXiv preprint arXiv:1311.4692},
  year   = {2017}
}

Comments

7 pages, 4 figures. Some typos corrected