Quantum entanglement for continuous variables sharing in an expanding spacetime

Abstract Detecting the structure of spacetime with quantum technologies has always been one frontier topics relativistic information. Here, we analytically study generation and redistribution Gaussian entanglement scalar fields in an expanding spacetime. We consider a two-mode squeezed state via amplification channel that corresponds to time-evolution from asymptotic past future. Therefore, dynamical universe encodes historical information about underlying structure, suggesting promising application observational cosmology. find is more sensitive expansion rate than volume. According analysis entanglement, choosing particles smaller momentum optimal mass better way extract universe. These results can guide simulation systems.