Derives an effective relativistic QFT on a dispersive cosmological spacetime from a BEC with time-dependent scattering length, showing trans-Planckian damping that violates scale invariance in analog expanding universes but converges to a new UV plateau.
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Simulations indicate that negative-curvature graphene membranes can form stable analogue horizons whose local density of states exhibits thermal character at a few tens of Kelvin.
An ad hoc source term added to the Dirac equation to model modified fermion anticommutation relations near black hole horizons produces stationary solutions interpreted as a fermion condensate.
Updated compilation shows PBHs are tightly constrained across 55 orders of magnitude in mass, ruling out dominant dark matter contributions except in narrow windows, with many limits carrying observational uncertainties.
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Superluminal modes in a quantum field simulator for cosmology from analog trans-Planckian physics
Derives an effective relativistic QFT on a dispersive cosmological spacetime from a BEC with time-dependent scattering length, showing trans-Planckian damping that violates scale invariance in analog expanding universes but converges to a new UV plateau.
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Constraints on Primordial Black Holes
Updated compilation shows PBHs are tightly constrained across 55 orders of magnitude in mass, ruling out dominant dark matter contributions except in narrow windows, with many limits carrying observational uncertainties.