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Entanglement of mixed macroscopic superpositions: an entangling-power study

M. Paternostro·H. Jeong·M. S. Kim
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Abstract

We investigate entanglement properties of a recently introduced class of macroscopic quantum superpositions in two-mode mixed states. One of the tools we use in order to infer the entanglement in this non-Gaussian class of states is the power to entangle a qubit system. Our study reveals features which are hidden in a standard approach to entanglement investigation based on the uncertainty principle of the quadrature variables. We briefly describe the experimental setup corresponding to our theoretical scenario and a suitable modification of the protocol which makes our proposal realizable within the current experimental capabilities.

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M. Paternostro, H. Jeong, M. S. Kim. 2005-10-10. Entanglement of mixed macroscopic superpositions: an entangling-power study. https://doi.org/10.1103/physreva.73.012338

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