In a 1+1-dimensional expanding spacetime model, an initial two-mode squeezed state's quantum discord decays while new discord appears in boson-antiboson mode pairs, with the cross-observer pair claimed to carry the most.
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Quantum discord of Ganssian states in an expanding universe
In a 1+1-dimensional expanding spacetime model, an initial two-mode squeezed state's quantum discord decays while new discord appears in boson-antiboson mode pairs, with the cross-observer pair claimed to carry the most.