Bell’s experiment with intra- and inter-pair entanglement: Single-particle mode entanglement as a case study

Autor(en)

Sahel Ashhab, Koji Maruyama, Caslav Brukner, Franco Nori

Abstrakt

Theoretical considerations of Bell-inequality experiments usually assume identically prepared and independent pairs of particles. Here we consider pairs that exhibit both intrapair and interpair entanglement. The pairs are taken from a large many-body system where all the pairs are generally entangled with each other. Using an explicit example based on single mode entanglement and an ancillary Bose-Einstein condensate, we show that the Bell-inequality violation in such systems can display statistical properties that are remarkably different from those obtained using identically prepared independent pairs. In particular, one can have probabilistic violation of Bell’s inequalities in which a finite fraction of all the runs result in violation even though there could be no violation when averaging over all the runs. Whether or not a particular run of results will end up being local realistically explainable is “decided” by a sequence of quantum (random) outcomes.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

RIKEN, University of Michigan

Journal

Physical Review A

Band

80

Anzahl der Seiten

6

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.80.062106

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/94456b29-68d6-4025-a231-b59cf8ca3383