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Berlin 2014 – scientific programme

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A: Fachverband Atomphysik

A 8: Ultra-cold atoms, ions and BEC II (with Q)

A 8.3: Talk

Monday, March 17, 2014, 14:30–14:45, BEBEL E34

Extracting entanglement from identical particles in BECs — •Nathan Killoran, Marcus Cramer, and Martin B. Plenio — Institut für Theoretische Physik, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany

When identical particles occupy the same spatial mode, such as in BECs, the notion of entanglement must be treated carefully. Because of symmetrization, such systems exhibit strong correlations, which appear as entanglement amongst the particles. But the identical particles are not individually accessible, so it is often assumed that such entanglement is unphysical and cannot be used for typical quantum information tasks. In this talk, we show that any apparent entanglement between identical particles can be faithfully transferred into entanglement between independent modes, which can then be applied to any standard quantum information protocol. We thus clarify and quantify the resource nature of entanglement between identical particles in BECs.

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