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QI: Fachverband Quanteninformation
QI 5: Entanglement Theory
QI 5.2: Vortrag
Montag, 18. März 2024, 15:30–15:45, HFT-FT 101
General class of continuous variable entanglement criteria — Martin Gärttner1,2,3,4, •Tobias Haas5, and Johannes Noll3 — 1Institut für Theoretische Physik, Universität Heidelberg, Germany — 2Physikalisches Institut, Universität Heidelberg, Germany — 3Kirchhoff-Institut für Physik, Universität Heidelberg, Germany — 4Institute of Condensed Matter Theory and Optics, Friedrich-Schiller-University Jena, Jena — 5Centre for Quantum Information and Communication, Université libre de Bruxelles, Belgium
We present a general class of entanglement criteria for continuous variable systems. Our criteria are based on the Husimi Q-distribution and allow for optimization over the set of all concave functions rendering them extremely general and versatile. We show that several entropic criteria and second moment criteria are obtained as special cases. Our criteria reveal entanglement of families of states undetected by any commonly used criteria and provide clear advantages under typical experimental constraints such as finite detector resolution and measurement statistics.
Based on PRL 131, 150201 and PRA 108, 042410.
Keywords: Quantum Entanglement; Continuous Variables; Husimi Q-distribution; Lieb-Solovej theorem; Majorization theory