3 research outputs found
Correlation-based entanglement criterion in bipartite multiboson systems
We describe a criterion for the detection of entanglement between two
multi-boson systems. The criterion is based on calculating correlations of
Gell-Mann matrices with a fixed boson number on each subsystem. This applies
naturally to systems such as two entangled spinor Bose-Einstein condensates. We
apply our criterion to several experimentally motivated examples, such as an entangled BECs, ac Stark shift induced two-mode squeezed BECs, and
photons under parametric down conversion. We find that entanglement can be
detected for all parameter regions for the most general criterion. Alternative
criteria based on a similar formalism are also discussed together with their
merits.Comment: 8 pages, 4 figures, journal versio