Homodyne detection of non-Gaussian quantum steering
arXiv:2201.11439 · doi:10.1103/PRXQuantum.3.030347
Abstract
Quantum correlations are at the core of current developments in quantum technologies. Certification protocols of entanglement and steering, suitable for continuous-variable non-Gaussian states are scarce and generally highly demanding from an experimental point of view. We propose a protocol based on Fisher information for witnessing steering in general continuous-variable bipartite states, through homodyne detection. It proves to be relevant for the detection of non-Gaussian steering in scenarios where witnesses based on Gaussian features like the covariance matrix are shown to fail.
14 pages, 14 figures, comments are welcome!
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