30 August 2017 Practical schemes of detecting entanglement with a single Hong-Ou-Mandel interferometer via quantum 2-design
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Abstract
In this work, we show that measurement in quantum 2-design, such as mutually unbiased bases (MUBs) or symmetric, informationally complete states (SICs), improves the capability of detecting entangled states both theoretically and experimentally. On the theoretical side, we show that measurement in quantum 2-design can detect entangled states twice compared to entanglement witnesses. On the implementation side, we present the scheme of entanglement detection with two detectors only of a Hong-Ou-Mandel interferometer. The experimental scheme applies single-copy level measurement followed by post-processing of measurement outcomes, which is feasible with current technologies.
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Joonwoo Bae, "Practical schemes of detecting entanglement with a single Hong-Ou-Mandel interferometer via quantum 2-design", Proc. SPIE 10409, Quantum Communications and Quantum Imaging XV, 1040905 (30 August 2017); doi: 10.1117/12.2273120; https://doi.org/10.1117/12.2273120
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