The most robust entangled state of light

Abstract

We study how photon absorption losses degrade the bipartite entanglement of entangled states of light. We consider two questions: (i) what state contains the smallest average number of photons given a fixed amount of entanglement? and (ii) what state is the most robust against photon absorption? We explain why the two-mode squeezed state is the answer to the first question but not quite to the second question.

9 figures, 7 pages, 2 authors

References in corpus (2)

• Entanglement of formation for symmetric Gaussian states
• Entanglement of photons

Cited by in corpus (9)

• Extremality of Gaussian quantum states
• Robustness of non-Gaussian entanglement against noisy amplifier and attenuator environments
• Decoherence of multi-dimensional entangled coherent states
• Communication via entangled coherent quantum network
• Exponentially enhanced quantum communication rate by multiplexing continuous-variable teleportation
• Simple proof of the robustness of Gaussian entanglement in bosonic noisy channels
• Quantum entanglement of decohered two-mode squeezed states in absorbing and amplifying environment
• Superior resilience of non-Gaussian entanglement against local Gaussian noises
• Some aspects of the interplay between bipartite correlations and quantum channels