On the distillation and purification of phase-diffused squeezed states

Abstract

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.

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• Reliable source of conditional non-Gaussian states from single-mode thermal fields
• Experimental test of nonclassicality criteria
• Drift wave turbulence in a dense semiclassical magnetoplasma
• Verifying single-mode nonclassicality beyond negativity in phase space
• Continuous-Variable Nonclassicality Detection under Coarse-Grained Measurement
• Non-Gaussianity of multiple photon subtracted thermal states in terms of compound-Poisson photon number distribution parameters: theory and experiment
• Markov Chain Monte Carlo Estimation of Quantum States
• Multiple copy distillation and purification of phase diffused squeezed states
• Entanglement Concentration for two atomic ensembles using an effective atom-light beamsplitter