Cosmological expansion induces interference that suppresses entanglement harvesting for expanding detectors but not fixed-size ones in de Sitter spacetime.
Schlicht, Considerations on the Unruh effect: causal- ity and regularization, Class
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A protocol with lattices of gapless detectors reconstructs the field's two-point function from detector correlations while correcting for finite-size effects via multipole expansion.
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Cosmological Expansion Induces Interference Between Communication and Entanglement Harvesting
Cosmological expansion induces interference that suppresses entanglement harvesting for expanding detectors but not fixed-size ones in de Sitter spacetime.
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Non-perturbative measurements of two-point functions in quantum field theory
A protocol with lattices of gapless detectors reconstructs the field's two-point function from detector correlations while correcting for finite-size effects via multipole expansion.