Robustness of non-Gaussian entanglement against noisy amplifier and attenuator environments

Details Robustness of non-Gaussian entanglement against noisy amplifier and attenuator environments Robustness of non-Gaussian entanglement against noisy amplifier and attenuator environments

2011-03-07

arxiv.org/abs/1103.1311v2

Phys. Rev. Lett. 107, 130501 (2011)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.107.130501

The recently developed Kraus representation for bosonic Gaussian channels is employed to study analytically the robustness of non-Gaussian entanglement against evolution under noisy attenuator and amplifier environments, and compare it with the robustness of Gaussian entanglement. Our results show that some non-Gaussian states with one ebit of entanglement are more robust than all Gaussian states, even the ones with arbitrarily large entanglement, a conclusion of direct consequence to the recent conjecture by Allegra et al. [PRL, 105, 100503 (2010)].

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