Low Energy States and CPT invariance at the Big Bang
arXiv:2302.08812 · doi:10.1103/PhysRevD.107.085018
Abstract
In this paper, we analyze the quantum vacuum in a radiation-dominated and CPT-invariant universe by further imposing the quantum states to be ultraviolet regular i.e., satisfying the Hadamard/adiabatic condition. For scalar fields, this is enforced by constructing the vacuum via the States of Low Energy proposal. For spin- fields, we extend this proposal for a FLRW spacetime and apply it for the radiation-dominated and CPT-invariant universe. We focus on minimizing the smeared energy density around the Big Bang and give strong evidence that the resulting states satisfy the Hadamard/adiabatic condition. These states are then self-consistent candidates as effective Big Bang quantum vacuum from the field theory perspective.
arXiv comment21 pages. PRD version
References in corpus (31)
- Superheavy dark matter
- Microlocal Analysis and Interacting Quantum Field Theories: Renormalization on Physical Backgrounds
- Local Wick Polynomials and Time Ordered Products of Quantum Fields in Curved Spacetime
- Existence of Local Covariant Time Ordered Products of Quantum Fields in Curved Spacetime
- CPT-Symmetric Universe
- Production of Purely Gravitational Dark Matter
- Cosmological Particle Production: A Review
- Adiabatic regularization and particle creation for spin one-half fields
- Short distance and initial state effects in inflation: stress tensor and decoherence
- The Necessity of the Hadamard Condition
- Adiabatic regularization for spin-1/2 fields
- The Hadamard Condition for Dirac Fields and Adiabatic States on Robertson-Walker Spacetimes
- Time Dependence of Particle Creation from Accelerating Mirrors
- Preferred instantaneous vacuum for linear scalar fields in cosmological space-times
- Renormalized stress-energy tensor for spin-1/2 fields in expanding universes
- States of Low Energy on Robertson-Walker Spacetimes
- Decay of the de Sitter Vacuum
- Adiabatic expansions for Dirac fields, renormalization, and anomalies
- Equivalence of Adiabatic and DeWitt-Schwinger renormalization schemes
- Cosmological particle creation in states of low energy
- States of Low Energy in bouncing inflationary scenarios in Loop Quantum Cosmology
- Revisiting a pre-inflationary radiation era and its effect on the CMB power spectrum
- Probing the Big Bang with quantum fields
- Hadamard States and Adiabatic Vacua
- Breaking of adiabatic invariance in the creation of particles by electromagnetic fields
- Note on the pragmatic mode-sum regularization method: translational-splitting in a cosmological background
- Equivalence of the adiabatic expansion and Hadamard renormalization for a charged scalar field
- Bonus Properties of States of Low Energy
- Massive particle pair production and oscillation in Friedman Universe: dark energy and matter interaction
- Semiclassical predictions regarding a pre-inflationary era and its effects on the power spectrum
- Argument for the radiation-dominated behavior of matter fields in the preinflationary era