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Speaker: Daniel Boyanovsky, University of Pittsburgh
Title: Gravitationally produced Dark Matter and its entropy.
Abstract:
Cosmological particle production is a feasible mechanism to produce DM candidates that only interact gravitationally. Their abundance and clustering properties are solely determined by the cosmological expansion history and mass, independent of any other couplings. In this talk I would like to discuss the production of light bosonic and heavy fermionic dark matter, properties of their energy momentum tensor and abundance. Perhaps paradoxically these DM candidates feature a non-vanishing entropy. It is a consequence of decoherence via dephasing during the adiabatic regime, and it is determined by the entanglement entropy.