Quantum interference in gravitational particle production

Abstract

Previous numerical investigations of gravitational particle production during the coherent oscillation period of inflation displayed unexplained fluctuations in the spectral density of the produced particles. We argue that these features are due to the quantum interference of the coherent scattering reactions that produce the particles. We provide accurate analytic formulae to compute the particle production amplitude for a conformally-coupled scalar field, including the interference effect in the kinematic region where the production can be interpreted as inflaton scattering into scalar final states via graviton exchange.

19 pages + appendices and references, 3 figures, v2 - references added, matches JHEP

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Cited by in corpus (4)

• Cosmological gravitational particle production of massive spin-2 particles
• Gravitational Production of Completely Dark Photons with Nonminimal Couplings to Gravity
• Completely Dark Matter from Rapid-Turn Multifield Inflation
• Jump Starting the Dark Sector with a Phase Transition