Monday, March 18, 2013

1303.3768 (Abolfazl Bayat et al.)

Entanglement Amplification in the Non-Perturbative Dynamics of Modular
Quantum Systems
   [PDF]

Abolfazl Bayat, Salvatore M. Giampaolo, Fabrizio Illuminati, Martin B. Plenio
We analyze the conditions for entanglement amplification between distant and not directly interacting quantum objects by their common coupling to media with static modular structure and subject to a local (single-bond) quenched dynamics. We show that in the non-perturbative regime of the dynamics the initial end-to-end entanglement is strongly amplified and, moreover, can be distributed efficiently between distant objects. Due to its intrinsic local and non-perturbative nature the dynamics is fast and robust against thermal fluctuations, and its control is undemanding. We show that the origin of entanglement amplification lies in the interference of the ground state and at most one of the low-lying energy eigenstates. The scheme can be generalized to provide a fast and efficient router for generating entanglement between simultaneous multiple users.
View original: http://arxiv.org/abs/1303.3768

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