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Quantum Stochastic Inflation
Robson Christie, Jaewoo Joo, Greg Kaplanek +2
We formulate stochastic inflation in an open quantum system framework. The field coarse-grained in a patch of fixed physical size, and the total momentum of that patch, form a cano…
Tunneling in Stochastic Inflation
Mahdiyar Noorbala, Vincent Vennin, Hooshyar Assadullahi +2
The relative probability to decay towards different vacua during inflation is studied. The calculation is performed in single-field slow-roll potentials using the stochastic inflat…
Quantum diffusion during inflation and primordial black holes
Chris Pattison, Vincent Vennin, Hooshyar Assadullahi +1
We calculate the full probability density function (PDF) of inflationary curvature perturbations, even in the presence of large quantum backreaction. Making use of the stochastic-$…
A Quantum Window Onto Early Inflation
Robert J. Hardwick, Vincent Vennin, David Wands
Inflation in the early Universe is one of the most promising probes of gravity in the high-energy regime. However, observable scales give access to a limited window in the inflatio…
Multiple Fields in Stochastic Inflation
Hooshyar Assadullahi, Hassan Firouzjahi, Mahdiyar Noorbala +2
Stochastic effects in multi-field inflationary scenarios are investigated. A hierarchy of diffusion equations is derived, the solutions of which yield moments of the numbers of inf…
Modulated curvaton decay
Hooshyar Assadullahi, Hassan Firouzjahi, Mohammad Hossein Namjoo +1
We study primordial density perturbations generated by the late decay of a curvaton field whose decay rate may be modulated by the local value of another isocurvature field, analog…