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Deutsche Physikalische Gessellschaft IOP Institute of Physics

On the distillation and purification of phase-diffused squeezed states

B Hage1,4, A Franzen1, J DiGuglielmo1, P Marek2, J Fiurášek3 and R Schnabel1

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Recently it was discovered that non-Gaussian decoherence processes, such as phase-diffusion, can be counteracted by purification and distillation protocols that are solely built on Gaussian operations. Here, we make use of this experimentally highly accessible regime, and provide a detailed experimental and theoretical analysis of several strategies for purification/distillation protocols on phase-diffused squeezed states. Our results provide valuable information for the optimization of such protocols with respect to the choice of the trigger quadrature, the trigger threshold value and the probability of generating a distilled state.


PACS

03.65.Yz Decoherence; open systems; quantum statistical methods

42.50.Dv Quantum state engineering and measurements

03.67.-a Quantum information

Subjects

Computational physics

Optics, quantum optics and lasers

Quantum information and quantum mechanics

Dates

Issue 7 (2007)

Received 18 April 2007

Published 12 July 2007



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