Cosmological Particle Creation Beyond de Sitter
arXiv:1905.04111 · doi:10.1142/S0218271819300155
Abstract
Over the years, de Sitter spacetime has been a central focus, in studies involving quantum fields, for its importance in the early and late expansion stages of the universe. While de Sitter spacetime closely mimics characteristics of the inflationary and dark energy dominated universe it does not help to understand the radiation and matter dominated expansions. In this review, we revisit some recent works, involving the author, which study gravitational particle creation beyond the de Sitter stage. Specifically, we present novel aspects of particle creation in the radiation dominated universe, and then provide an analysis of time evolution of the primordial (Bunch-Davies) vacuum state, its particle excitation and quantum versus classical behavior of field modes, in a multi stage universe, comprising of, (i) the inflationary de Sitter, (ii) the radiation dominated and, (iii) the late dark energy dominated stages.
Invited Review Article to IJMPD (published); 33 pages, 7 figures; Based on author's previous articles arXiv:1308.4976, arXiv:1802.03833 and arXiv:1806.00972
References in corpus (12)
- A Primer for Black Hole Quantum Physics
- De Sitter Space and Eternity
- The IR stability of de Sitter: Loop corrections to scalar propagators
- Subtleties in the quasi-classical calculation of Hawking radiation
- Improved Approximations for Fermion Pair Production in Inhomogeneous Electric Fields
- Interacting Field Theories in de Sitter Space are Non-Unitary
- Classicality of the primordial perturbations
- Particle creation, classicality and related issues in quantum field theory: I. Formalism and toy models
- de Sitter Space is Unstable in Quantum Gravity
- Particle creation, classicality and related issues in quantum field theory: II. Examples from field theory
- Instability of Quantum de Sitter Spacetime
- Particle creation in a time-dependent electric field revisited
Cited by in corpus (4)
- Detector response along null geodesics in black hole spacetimes and in a Friedmann-Lemaitre-Robertson-Walker Universe
- Computation of Gravitational Particle Production Using Adiabatic Invariants
- Quantum field theory in a de Sitter universe transiting to the radiation stage
- Is Dark Energy an Effective Manifestation of Non-equilibrium Thermodynamics? -- Insights from DESI