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This study explores the transfer of nonclassical correlations from anultra-cold atom system to a pair of pulsed laser beams. Through nondestructivelocal probe measurements, we introduce an alternative to destructive techniquesfor mapping BEC entanglement. Operating at ultralow temperatures, the setupemulates a relativistic vacuum field, using lasers as Unruh-DeWitt detectorsfor phonons. The vacuum holds intrinsic entanglement, transferable to distantprobes briefly interacting with it - a phenomenon termed ``entanglementharvesting''. Our study accomplishes two primary objectives: first,establishing a mathematical equivalence between a pair of pulsed laser probesinteracting with an effective relativistic field and the entanglementharvesting protocol; and second, to closely examine the potential andpersisting obstacles for realising this protocol in an ultra-cold atomexperiment.

Vacuum entanglement probes for ultra-cold atom systems