Quantum Squeezing and Cosmological Entropy Production

Abstract

The entropy growth in a cosmological process of pair production is completely determined by the associated squeezing parameter, and is insensitive to the number of particles in the initial state. The total produced entropy may represent a significant fraction of the entropy stored today in the cosmic black-body radiation, provided pair production originates from a change in the background metric at a curvature scale of the Planck order.

7 pages, plain TEX, to appear in Class.Quantum Grav., CERN-TH.6954/93

References in corpus (7)

• Pre-Big-Bang in String Cosmology
• $O(d,d)$-Covariant String Cosmology
• Entropy of a Classical Stochastic Field and Cosmological Perturbation
• The Entropy of the Gravitational Field
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• Squeezed Thermal Vacuum and the Maximum Scale for Inflation
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• A Fluctuation-Dissipation Relation for Semiclassical Cosmology
• The Generalized Second Law of Thermodynamics in Cosmology
• Entropy of gravitons produced in the early Universe
• Entanglement Entropy of Cosmological Perturbations
• Stochastic backgrounds of relic gravitons: a theoretical appraisal
• Primordial backgrounds of relic gravitons
• Inflationary spectra and partially decohered distributions
• Lectures on string theory and cosmology
• Theoretical tools for CMB physics
• A Model for the Big Bounce
• Holographic bounds on the UV cutoff scale in inflationary cosmology
• Assigning Quantum-Mechanical Initial Conditions to Cosmological Perturbations
• Recollapsing quantum cosmologies and the question of entropy
• Inflationary entanglement
• Large Squeezing Behavior of Cosmological Entropy Generation
• No intrinsic decoherence of inflationary cosmological perturbations
• Holography, inflation, and quantum fluctuations in the early universe
• Quantum entanglement in cosmology
• Entanglement and Expansion
• Entanglement of Harmonic Systems in Squeezed States
• Blue Spectra of Kalb-Ramond Axions and Fully Anisotropic String Cosmologies
• Superhorizon entanglement from inflationary particle production
• On the Phase-Space Volume of Primordial Cosmological Perturbations
• Emergence of Classicality in Quantum Phase Transitions
• On the origin of entropy of gravitationally produced dark matter: the entanglement entropy
• Relic gravitational waves and the generalized second law
• A pedestrian introduction to coherent and squeezed states
• Information paradox and island in quasi-de Sitter space
• Glauber theory and the quantum coherence of curvature inhomogeneities
• Entanglement in Cosmology
• Inflationary spectra, decoherence, and two-mode coherent states
• Why CMB physics?
• Coherent and squeezed states in black-hole evaporation
• Gaussian state for the bouncing quantum cosmology
• The symplectic group in Polymer Quantum Mechanics
• A not so brief commentary on cosmological entropy bounds
• On Coarse-grained Entropy and Stimulated Emission in Curved Space-Time
• A Momentous Arrow of Time
• The relation between the symplectic group $Sp(4,\mathbb{R})$ and its Lie algebra: its application in polymer quantum mechanics
• Quantum amplitudes in black-hole evaporation: coherent and squeezed states
• Entanglement entropy of cosmological perturbations for S-brane Ekpyrosis
• Squeezed States in Black-Hole Evaporation by Analytic Continuation
• String theory and primordial cosmology
• Squeezed Thermal State Representation of the Inflaton and Particle Production in Bianchi type-I Universe
• Power of photonic states: from quantum computation to cosmology
• Squeeze operator: a classical view
• Fisher's arrow of `time' in cosmological coherent phase space
• Intrinsic Entropy of Squeezed Quantum Fields and Nonequilibrium Quantum Dynamics of Cosmological Perturbations