Phase-resolved scalar distance bounds are derived for ekpyrotic, bouncing, and cyclic cosmologies, yielding a master condition that lower-bounds ε_ek from remaining distance after conversion and bounce.
The matter bounce alternative to inflation- ary cosmology
6 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
A bouncing cosmology with an initial matter-dominated phase of contraction during which scales which are currently probed with cosmological observations exit the Hubble radius provides a mechanism alternative to inflation for producing a nearly scale-invariant spectrum of cosmological perturbations. In this review article I first discuss the evolution of cosmological fluctuations in the matter bounce scenario, and then discuss various attempts at realizing such a scenario. Observational signatures which will allow the matter bounce to be distinguished from the inflationary paradigm are also discussed.
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gr-qc 6representative citing papers
Derives an effective relativistic QFT on a dispersive cosmological spacetime from a BEC with time-dependent scattering length, showing trans-Planckian damping that violates scale invariance in analog expanding universes but converges to a new UV plateau.
Loop quantum cosmology models harbor physical singularities or inconsistent space-time structures, with a new effective Friedmann equation revealing a sub-Planckian bounce after a singularity at infinite scale factor resembling a time-reversed big rip.
A quasi-dust ekpyrotic two-field model in Loop Quantum Cosmology produces viable primordial power spectra via coupled scalar and tensor perturbations.
Negative quadratic trace parameter β in f(R,T) = R + αT + βT² gravity with Chaplygin gas enables non-singular bounces via geometric NEC violation without exotic matter, with viable stability and de Sitter attractor.
Modified gravity theories supply viable mathematical frameworks for inflation, bounces, and dark energy eras that match observational data.
citing papers explorer
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Phase-resolved field-space distance bounds in ekpyrotic, bouncing and cyclic cosmologies
Phase-resolved scalar distance bounds are derived for ekpyrotic, bouncing, and cyclic cosmologies, yielding a master condition that lower-bounds ε_ek from remaining distance after conversion and bounce.
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Superluminal modes in a quantum field simulator for cosmology from analog trans-Planckian physics
Derives an effective relativistic QFT on a dispersive cosmological spacetime from a BEC with time-dependent scattering length, showing trans-Planckian damping that violates scale invariance in analog expanding universes but converges to a new UV plateau.
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Singularities in loop quantum cosmology
Loop quantum cosmology models harbor physical singularities or inconsistent space-time structures, with a new effective Friedmann equation revealing a sub-Planckian bounce after a singularity at infinite scale factor resembling a time-reversed big rip.
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Quasi-dust ekpyrotic scenario in Loop Quantum Cosmology
A quasi-dust ekpyrotic two-field model in Loop Quantum Cosmology produces viable primordial power spectra via coupled scalar and tensor perturbations.
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A Study of Non-Singular Bounce in Myrzakulov-type $f(R,T)$ Gravity with Chaplygin Gas
Negative quadratic trace parameter β in f(R,T) = R + αT + βT² gravity with Chaplygin gas enables non-singular bounces via geometric NEC violation without exotic matter, with viable stability and de Sitter attractor.
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Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
Modified gravity theories supply viable mathematical frameworks for inflation, bounces, and dark energy eras that match observational data.