Decoherence out of fire: Purity loss in expanding and contracting universes
arXiv:2401.02832 · doi:10.1088/1475-7516/2024/05/025
Abstract
We investigate quantum decoherence in a class of models which interpolates between expanding (inflation) and contracting (ekpyrosis) scenarios. For the cases which result in a scale-invariant power spectrum, we find that ekpyrotic universes lead to complete decoherence of the curvature perturbation before the bounce. This is in stark contrast to the inflationary case, where recoherence has been previously observed in some situations. Although the purity can be computed for couplings of all sizes, we also study the purity perturbatively and observe that late-time (secular growth) breakdown of perturbation theory often occurs in these cases. Instead, we establish a simple yet powerful late-time purity resummation which captures the exact evolution to a remarkable level, while maintaining analytical control. We conclude that the cosmological background plays a crucial role in the decoupling of the heavy fields during inflation and alternatives.
arXiv comment27 pages + appendices, 10 figures
References in corpus (131)
- Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
- Planck 2018 results. X. Constraints on inflation
- The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
- Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
- The Pre-Big Bang Scenario in String Cosmology
- From Big Crunch to Big Bang
- Semiclassicality and Decoherence of Cosmological Perturbations
- A Cyclic Model of the Universe
- Quantum speed limits: from Heisenberg's uncertainty principle to optimal quantum control
- Quasi-Single Field Inflation and Non-Gaussianities
- On the Generation of a Scale-Invariant Spectrum of Adiabatic Fluctuations in Cosmological Models with a Contracting Phase
- Bouncing Cosmologies: Progress and Problems
- Inflation and squeezed quantum states
- A Critical Review of Classical Bouncing Cosmologies
- New Ekpyrotic Cosmology
- Symplectic invariants, entropic measures and correlations of Gaussian states
- Quantum-to-classical transition for fluctuations in the early Universe
- Density Perturbations in the Ekpyrotic Scenario
- Brane Gases in the Early Universe
- Generating Ekpyrotic Curvature Perturbations Before the Big Bang
- The Gelaton Scenario: Equilateral non-Gaussianity from multi-field dynamics
- A smooth bouncing cosmology with scale invariant spectrum
- On the Construction of Nonsingular Pre-Big-Bang and Ekpyrotic Cosmologies and the Resulting Density Perturbations
- The primordial curvature perturbation in the ekpyrotic Universe
- Effective theories of single field inflation when heavy fields matter
- Quantum-to-classical Transition of Cosmological Perturbations for Non-vacuum Initial States
- Pyrotechnic Universe
- Efficient Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
- Primordial perturbations in a non singular bouncing universe model
- Pointer states for primordial fluctuations in inflationary cosmology
- On the Spectrum of Fluctuations in an Effective Field Theory of the Ekpyrotic Universe
- On the importance of heavy fields during inflation
- Decoherence during Inflation: the generation of classical inhomogeneities
- A new kind of cyclic universe
- A Master Equation for Gravitational Decoherence: Probing the Textures of Spacetime
- Open EFTs, IR Effects and Late-Time Resummations: Systematic Corrections in Stochastic Inflation
- Adiabatic perturbations in pre big bang models: matching conditions and scale invariance
- Cosmological Perturbations in a Big Crunch/Big Bang Space-time
- On the Decoherence of Primordial Fluctuations During Inflation
- Bouncing Cosmology made simple
- A model with cosmological Bell inequalities
- Passing through the bounce in the ekpyrotic models
- Inflationary Perturbations: the Cosmological Schwinger Effect
- Entropy of a Classical Stochastic Field and Cosmological Perturbation
- Isocurvature perturbations in the Ekpyrotic universe
- An effective field theory during inflation: reduced density matrix and its quantum master equation
- Conditions for Generating Scale-Invariant Density Perturbations
- A non inflationary model with scale invariant cosmological perturbations
- Staying positive: going beyond Lindblad with perturbative master equations
- Inflationary Theory and Alternative Cosmology
- Loitering Phase in Brane Gas Cosmology
- Quasi Single Field Inflation in the non-perturbative regime
- Quantum Decoherence During Inflation from Gravitational Nonlinearities
- Inflationary spectra and violations of Bell inequalities
- Observational issues in loop quantum cosmology
- On the Decoherence of Primordial Fluctuations During Inflation
- Decoherence, discord and the quantum master equation for cosmological perturbations
- Entanglement Entropy of Cosmological Perturbations
- Obstructions to Bell CMB Experiments
- Noise and decoherence induced by gravitons
- Cosmological Bootstrap in Slow Motion
- Cosmic Bounces and Cyclic Universes
- Decoherence in quantum cosmology at the onset of inflation
- An effective field theory during inflation II: stochastic dynamics and power spectrum suppression
- Dark Energy Survey Year 3 results: cosmological constraints from the analysis of cosmic shear in harmonic space
- Ekpyrotic Non-Gaussianity -- A Review
- Bell violation in the Sky
- Observational constraints on quantum decoherence during inflation
- Curvature perturbations from ekpyrotic collapse with multiple fields
- Planck-Suppressed Operators
- Entropy and Uncertainty of Squeezed Quantum Open Systems
- Scale-invariance in expanding and contracting universes from two-field models
- Gravitationally induced decoherence vs space-time diffusion: testing the quantum nature of gravity
- Minimal decoherence from inflation
- Note on the production of scale-invariant entropy perturbation in the Ekpyrotic universe
- A cosmological open quantum system
- Numerical evaluation of the bispectrum in multiple field inflation
- Effective Field Theory out of Equilibrium: Brownian quantum fields
- Canonical transformations and squeezing formalism in cosmology
- Entangled de Sitter from Stringy Axionic Bell pair I: An analysis using Bunch Davies vacuum
- Bell violation in primordial cosmology
- Non Gaussianities from Quantum Decoherence during Inflation
- Discord and Decoherence
- Benchmarking the cosmological master equations
- Quantum entanglement in de Sitter space from Stringy Axion: An analysis using vacua
- Searching for Standard Clocks in the Primordial Universe
- Decoherence from Isocurvature Perturbations in Inflation
- Scalar perturbations in regular two-component bouncing cosmologies
- Spectra of primordial fluctuations in two-perfect-fluid regular bounces
- Quantum Primordial Standard Clocks
- Hot Accelerated Qubits: Decoherence, Thermalization, Secular Growth and Reliable Late-time Predictions
- Constraining Single-Field Inflation with MegaMapper
- Open Quantum Entanglement: A study of two atomic system in static patch of de Sitter space
- On the Quantum-To-Classical Transition for Ekpyrotic Perturbations
- Quantum corrections to the primordial tensor spectrum: Open EFTs & Markovian decoupling of UV modes
- Quantum Standard Clocks in the Primordial Trispectrum
- Regular two-component bouncing cosmologies and perturbations therein
- Quantum recoherence in the early universe
- On adiabatic perturbations in the ekpyrotic scenario
- Reheating after S-Brane Ekpyrosis
- Universal signature of quantum entanglement across cosmological distances
- Constraining primordial non-Gaussianity from DESI quasar targets and Planck CMB lensing
- The anamorphic universe
- Imprint of entanglement entropy in the power spectrum of inflationary fluctuations
- Numerically evaluating the bispectrum in curved field-space - with PyTransport 2.0
- Four-mode squeezed states: two-field quantum systems and the symplectic group
- Thermalization in Quenched Open Quantum Cosmology
- Cosmic decoherence: primordial power spectra and non-Gaussianities
- Qubits on the Horizon: Decoherence and Thermalization near Black Holes
- Cosmological spectrum of two-point correlation function from vacuum fluctuation of Stringy Axion field in De Sitter space: A study of the role of Quantum Entanglement
- Information loss in effective field theory: entanglement and thermal entropies
- Effective master equations for two accelerated qubits
- Non-equilibrium dynamics of Axion-like particles: the quantum master equation
- Enhanced power on small scales and evolution of quantum state of perturbations in single and two field inflationary models
- Comparing quantumness criteria
- Quantum Hotspots: Mean Fields, Open EFTs, Nonlocality and Decoherence Near Black Holes
- Master equation for the Unruh-DeWitt detector and the universal relaxation time in de Sitter space
- On the Decoherence of Primordial Gravitons
- Qubit Heating Near a Hotspot
- Quantum thermodynamics of de Sitter space
- A Note on Perturbations During a Regular Bounce
- Sourcing curvature modes with entropy perturbations in non-singular bouncing cosmologies
- Open Quantum System Approach to the Gravitational Decoherence of Spin-1/2 Particles
- Relating the curvature of De Sitter Universe to Open Quantum Lamb Shift Spectroscopy
- On the origin of entropy of gravitationally produced dark matter: the entanglement entropy
- Self-consistent dynamical maps for open quantum systems
- Classifying the non-time-local and entangling dynamics of an open qubit system
- The Cosmological Flow: A Systematic Approach to Primordial Correlators
- Distinguishing cosmological models through quantum signatures of primordial perturbations
- Non-adiabatic primordial fluctuations
- Time-local master equations: influence functional and cumulant expansion
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- Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
- In-in formalism for the entropy of quantum fields in curved spacetimes
- An Open Effective Field Theory for light in a medium
- Regularized-Renormalized-Resummed loop corrected power spectrum of non-singular bounce with Primordial Black Hole formation
- Does decoherence violate decoupling?
- Perturbative unitarity bounds from momentum-space entanglement
- Negative non-Gaussianity as a salvager for PBHs with PTAs in bounce
- Probing the self-coherence of primordial quantum fluctuations with complexity
- Lindblad evolution as gradient flow
- Perturbative unitarity bounds on field-space curvature in de Sitter spacetime: purity vs scattering amplitude
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- Exploring gravitational impulse via quantum Boltzmann equation
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