Entanglement Detection Based on Interference and Particle Counting

Details Entanglement Detection Based on Interference and Particle Counting Entanglement Detection Based on Interference and Particle Counting

2003-06-12

arxiv.org/abs/quant-ph/0306086v2

Physical Review A 68, 062310 (2003)

Physics

Quantum Physics

6 pages, revtex4; an example together with a couple of paragraphs extra explanation is inserted in Sec. II.A + minor changes b

Scientific paper

10.1103/PhysRevA.68.062310

A sufficient condition for entanglement in two-mode continuous systems is constructed based on interference visibility and the uncertainty of the total particle number. The observables to be measured (particle numbers and particle number variances) are relatively easily accessible experimentally. The method may be used to detect entanglement in light fields or in Bose-Einstein condensates. In contrast to the standard approach based on entanglement witnesses, the condition is expressed in terms of an inequality which is nonlinear in expectation values.

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