Squeezing concentration for Gaussian states with unknown parameter

Details Squeezing concentration for Gaussian states with unknown parameter Squeezing concentration for Gaussian states with unknown parameter

2002-04-18

arxiv.org/abs/quant-ph/0204105v1

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

A continuous-variable analog of the Deutsch's distillation protocol locally operating with two copies of the same Gaussian state is suggested. Irrespectively of the impossibility of Gaussian state distillation, we reveal that this protocol is able to perform a squeezing concentration of the Gaussian states with {\em unknown} displacement. Since this operation cannot be implemented using only single copy of the state, it is a new application of the distillation protocol which utilizes two copies of the same Gaussian state.

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