Constructing Entanglement Witnesses from Two Mutually Unbiased Bases
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DOI: 10.1007/s10773-020-04689-6
Abstract: We study entanglement witnesses (EWs) and construct a linear map by taking two groups of mutually unbiased bases (MUBs) of two Hilbert spaces. We provide two new relations about matrices (may not be square matrices)… read more here.
Keywords: mutually unbiased; unbiased bases; witnesses two; entanglement witnesses ... See more keywords
Optimization of ultrafine entanglement witnesses
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DOI: 10.1103/physreva.97.032343
Abstract: The ultrafine entanglement witness, introduced in [F. Shahandeh, M. Ringbauer, J.C. Loredo, and T.C. Ralph, Phys. Rev. Lett. \textbf{118}, 110502 (2017)], can seamlessly and easily improve any standard entanglement witness. In this paper, by combining… read more here.
Keywords: optimization ultrafine; original ultrafine; entanglement witness; entanglement ... See more keywords
Dynamics-Based Entanglement Witnesses for Non-Gaussian States of Harmonic Oscillators.
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DOI: 10.1103/physrevlett.130.160201
Abstract: We introduce a family of entanglement witnesses for continuous variable systems, which rely on the sole assumption that their dynamics is that of coupled harmonic oscillators at the time of the test. Entanglement is inferred… read more here.
Keywords: based entanglement; harmonic oscillators; non gaussian; gaussian states ... See more keywords