Abstract
We consider the problem of entanglement criteria in non-Gaussian systems, providing a necessary and sufficient condition of separability of non-Gaussian states based on strong positive partial transpose (SPPT) of the corresponding density matrices. The separability conditions of states generated by photon subtraction from vacuum squeezed states are given.
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Belfakir, A., Ziane, M., El Baz, M. et al. Non-Gaussian states with strong positive partial transpose. Eur. Phys. J. D 73, 216 (2019). https://doi.org/10.1140/epjd/e2019-100368-6
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DOI: https://doi.org/10.1140/epjd/e2019-100368-6