Repeated expansion-contraction cycles in a BEC analogue universe should make phonon-pair entanglement detectable at about 2 sigma now and above 3.3 sigma with modest upgrades.
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Toward the Observation of Entangled Pairs in BEC analogue Expanding Universes
Repeated expansion-contraction cycles in a BEC analogue universe should make phonon-pair entanglement detectable at about 2 sigma now and above 3.3 sigma with modest upgrades.