Entanglement concentration of continuous variable quantum states

Abstract

We propose two probabilistic entanglement concentration schemes for a single copy of two-mode squeezed vacuum state. The first scheme is based on the off-resonant interaction of a Rydberg atom with the cavity field while the second setup involves the cross Kerr interaction, auxiliary mode prepared in a strong coherent state and a homodyne detection. We show that the continuous-variable entanglement concentration allows us to improve the fidelity of teleportation of coherent states.

7 pages, 7 figures

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• Experimental distillation of squeezing from non-Gaussian quantum states
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• Enhancing quantum correlations and entanglement in an optomechanical system via cross-Kerr nonlinearity
• Giant Kerr nonlinearities and magneto-optical rotations in a Rydberg-atom gas via double electromagnetically induced transparency
• Highly non-Gaussian states created via cross-Kerr nonlinearity
• Cross-Kerr interaction in a four-level atomic system
• Procrustean entanglement concentration of continuous variable states of light
• Displacement-enhanced entanglement distillation of single-mode-squeezed entangled states
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• Entanglement of mixed macroscopic superpositions: an entangling-power study
• Entanglement concentration and purification of two-mode squeezed microwave photons in circuit QED
• Quantum state engineering, purification, and number resolved photon detection with high finesse optical cavities
• Weak Values and Continuous-Variable Entanglement Concentration
• Weak Measurements with Entangled Probes
• Enabling entanglement distillation via optomechanics
• Verifying cross-Kerr induced number squeezing: a case study
• Entanglement Enhancement in Multimode Integrated Circuits
• Entanglement Concentration for two atomic ensembles using an effective atom-light beamsplitter
• Validation of entanglement purification by continuous variable polarization