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GR: Fachverband Gravitation und Relativitätstheorie
GR 10: Quantum Gravity and Quantum Cosmology 1
GR 10.2: Vortrag
Mittwoch, 1. April 2020, 16:45–17:00, H-HS IX
Cosmological Decoherence from Thermal Gravitons — Ning Bao1,2, •Aidan Chatwin-Davies3, Jason Pollack4, and Grant Remmen1 — 1University of California, Berkeley, USA — 2Brookhaven National Lab, NY, USA — 3KU Leuven, Belgium — 4University of British Columbia, Canada
Coupling a coherent superposition of stress-energy to a bath of gravitons of course causes the superposition to decohere. While the decoherence rate may be very small in everyday configurations, such gravitational interactions can nevertheless have an appreciable effect over the course of cosmic history in the presence of a positive cosmological constant, which sources a thermal bath of gravitons. I will discuss some recent work which studies the effects of gravitationally-driven decoherence on tunneling processes associated with false vacuum decays, commenting on the consequences of these effects, as well as on further applications and observability.