Trans-Planckian Censorship and Inflationary Cosmology

Abstract

We study the implications of the recently proposed Trans-Planckian Censorship Conjecture (TCC) for early universe cosmology and in particular inflationary cosmology. The TCC leads to the conclusion that if we want inflationary cosmology to provide a successful scenario for cosmological structure formation, the energy scale of inflation has to be lower than $10^9$ GeV. Demanding the correct amplitude of the cosmological perturbations then forces the generalized slow-roll parameter $\epsilon$ of the model to be very small ($<10^{-31}$). This leads to the prediction of a negligible amplitude of primordial gravitational waves. For slow-roll inflation models, it also leads to severe fine tuning of initial conditions.

arXiv comment6 pages, 1 figure

References in corpus (29)

• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
• On the Geometry of the String Landscape and the Swampland
• Pre-Big-Bang in String Cosmology
• The Swampland: Introduction and Review
• Warm Inflation
• The Trans-Planckian Problem of Inflationary Cosmology
• Distance and de Sitter Conjectures on the Swampland
• De Sitter Space and the Swampland
• On the Generation of a Scale-Invariant Spectrum of Adiabatic Fluctuations in Cosmological Models with a Contracting Phase
• Inflation as a Probe of Short Distance Physics
• Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology
• Power Spectrum of Primordial Inhomogeneity Determined from the 4-Year COBE DMR Sky Maps
• Inflation with a Planck-scale frequency cutoff
• Perturbation spectrum in inflation with cutoff
• Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
• Alternatives to Cosmological Inflation
• Beginning inflation in an inhomogeneous universe
• Warm inflation as a way out of the swampland
• Warm Inflation in the light of Swampland Criteria
• Robustness of Inflation to Inhomogeneous Initial Conditions
• Cosmological Perturbations from a New-Physics Hypersurface
• The Accelerating Universe and Dark Energy: Evidence from Type Ia Supernovae
• Electroweak baryogenesis and primordial hypermagnetic fields
• Cosmic acceleration, scalar fields and observations
• Measuring spacetime: from big bang to black holes
• Inflation and Braneworlds
• Cosmological applications of loop quantum gravity
• Lectures on the Theory of Cosmological Perturbations

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• Recent developments in warm inflation
• Distance, de Sitter and Trans-Planckian Censorship conjectures: the status quo of Warm Inflation
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• Constraining power of asymptotic safety for scalar fields
• Universal Upper Bound on the Inflationary Energy Scale from the Trans-Planckian Censorship Conjecture
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• The challenge of ruling out inflation via the primordial graviton background
• Warm brane inflation with an exponential potential: A consistent realization away from the swampland
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• The Rise of Cosmological Complexity: Saturation of Growth and Chaos
• de Sitter in non-supersymmetric string theories: no-go theorems and brane-worlds
• Is the NANOGrav signal a hint of dS decay during inflation?
• Tachyonic Preheating in Palatini $R^2$ Inflation
• Nonsingular Ekpyrotic Cosmology with a Nearly Scale-Invariant Spectrum of Cosmological Perturbations and Gravitational Waves
• The trans-Planckian censorship conjecture from the swampland distance conjecture
• Implications of Palatini gravity for inflation and beyond
• Emergent Cosmology from Matrix Theory
• Warm dark energy
• Ekpyrotic Cosmology with a Zero-Shear S-Brane
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• Dark Matter and Gravity Waves from a Dark Big Bang
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• Phenomenological implications of modified loop cosmologies: an overview
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• de Sitter Space as a Glauber-Sudarshan State
• Polynomial Inflation and Dark Matter
• Four-dimensional de Sitter space is a Glauber-Sudarshan state in string theory
• Torsion in string-inspired cosmologies and the universe dark sector
• Emergent Metric Space-Time from Matrix Theory
• Stringy Running Vacuum Model and current Tensions in Cosmology
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• The unbearable lightness of charged gravitini
• Quantum Circuit Complexity of Primordial Perturbations
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• Brane inflation and Trans-Planckian censorship conjecture
• Cosmological Trans-Planckian Conjectures are not Effective
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• On the TransPlanckian Censorship Conjecture in Holographic Cosmology
• de Sitter Bubbles and the Swampland
• Resurgence of a de Sitter Glauber-Sudarshan State: Nodal Diagrams and Borel Resummation
• Creating Spatial Flatness by Combining String Gas Cosmology and Power Law Inflation
• Visions in Quantum Gravity
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• Unitarity Problems for an Effective Field Theory Description of Early Universe Cosmology
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• How a four-dimensional de Sitter solution remains outside the swampland
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• Quantum Fisher Cosmology: Confronting Observations and the Trans-Planckian Problem
• Rejuvenating the hope of a swampland consistent inflated multiverse with tachyonic inflation in the high energy RS-II Braneworld
• Scalar Cosmological Perturbations from Quantum Entanglement within Lorentzian Quantum Gravity
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• Lorentz violating inflation and the Swampland
• Consistency of Cubic Galileon Cosmology: Model-Independent Bounds from Background Expansion and Perturbative Analyses
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• Cosmology as a weak gravitational field and the trans-Planckian problem
• TCC bounds on the static patch of de Sitter space
• Purely non-perturbative AdS vacua and the swampland
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• Notes on the Quantum Corrections of Swampland and Trans-Planckian Censorship Conjecture
• Catalytic Creation of Bubble Universe Induced by Quintessence in Five Dimensions
• Swampland conjectures and single field inflation in non-standard cosmological scenarios
• A Local Wheeler-DeWitt Measure for the String Landscape
• Semiclassical predictions regarding a pre-inflationary era and its effects on the power spectrum
• Expansion-contraction duality breaking in a Planck-scale sensitive cosmological quantum simulator
• Supersymmetric Hybrid Inflation in Light of CMB Experiments and Swampland Conjectures
• Radiative stability of tiny cosmological constant from the Swampland and quantized compactification
• Conditions for the Absence of Infrared Sensitivity in Cosmological Probes in Any Gravity Theories
• What if string theory has a de Sitter excited state?
• Emergent universe revisited through the CSL theory
• $\alpha$-attractor potentials in loop quantum cosmology
• Multi-field inflation from single-field models
• Axion Monodromy Inflation, Trapping Mechanisms and the Swampland
• Quantum-Ordering Ambiguities in Weak Chern-Simons 4D Gravity and Metastability of the Condensate-Induced Inflation
• A Bouncing Cosmology from VECROs
• Constraining the quintessential $\alpha$-attractor inflation through dynamical horizon exit method
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• The Trans-Planckian problem in Tachyacoustic Cosmology
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• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
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