Constraining tachyonic inflationary β-exponential model with Continuous Spontaneous Localization collapse scheme

Abstract

In this work, we consider the dynamics of the self-induced collapse of the tachyon wave function in inflationary scenarios. We analyze the modifications on the power spectrum by considering the $\beta$-exponential potential, whose parameters have updated constraints by the Planck 2018 baseline data and recent results from the Atacama Cosmology Telescope (ACT). Moreover, we show that for this kind of potential, just for a narrow range of $\beta$-parameter, there is agreement between the theoretical predictions and the current observational data. Considering the proposal for a collapse scheme that leads to the modification of Schrödinger evolution of the inflation wave function from the employment of a Continuous Spontaneous Localization (CSL) approach, we derive the scalar spectral index and tensor-to-scalar ratio. We then obtained the constraints on both collapse and $\beta$-parameters that, in turn, yield deviations in the $n_s$ vs. $r$ plane when compared to the $\beta$-exponential potential standard estimate. The CSL scheme applied to tachyonic inflation driven by a $\beta$-potential offers an adequate description of the recent data.

arXiv comment19 pages, 4 figures; Published in the Modern Physics Letters A

References in corpus (37)

• Planck 2018 results. X. Constraints on inflation
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Tachyon Condensation on the Brane Antibrane System
• Cosmological Evolution of the Rolling Tachyon
• Can the clustered dark matter and the smooth dark energy arise from the same scalar field ?
• Tachyon couplings on non-BPS D-branes and Dirac-Born-Infeld action
• Prospects and Problems of Tachyon Matter Cosmology
• Inflation from a Tachyon Fluid?
• Aspects of Tachyonic Inflation with Exponential Potential
• Thoughts on Tachyon Cosmology
• Problems with Tachyon Inflation
• Cosmological perturbations in a generalized gravity including tachyonic condensation
• On the quantum origin of the seeds of cosmic structure
• Cosmological Constraints on Tachyon Matter
• Rapidly-Varying Speed of Sound, Scale Invariance and Non-Gaussian Signatures
• Shortcomings in the Understanding of Why Cosmological Perturbations Look Classical
• Tachyon inflation: tests and comparison with single scalar field inflation
• Interacting new agegraphic tachyon, K-essence and dilaton scalar field models of dark energy in non-flat universe
• A cosmic shadow on CSL
• CMB constraints on $\beta$-exponential inflationary models
• Warm DBI inflation with constant sound speed
• Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy
• Tachyon inflation with steep potentials
• Emergence of inflationary perturbations in the CSL model
• $\beta$-exponential inflation
• Resurrecting the Power-law, Intermediate, and Logamediate Inflations in the DBI Scenario with Constant Sound Speed
• Constraining quantum collapse inflationary models with CMB data
• Inflation including collapse of the wave function: The quasi-de Sitter case
• Constraining quantum collapse inflationary models with current data: The semiclassical approach
• Inflation and the Measurement Problem
• Constraining non-minimally coupled $\beta$-exponential inflation with CMB data
• Perturbations in Tachyon Dark Energy and their Effect on Matter Clustering
• Enlightening the CSL model landscape in inflation
• Structure formation in clustering DBI dark energy model with constant sound speed
• The growth of DM and DE perturbations in DBI non-canonical scalar field scenario
• Hamilton-Jacobi formalism for k-inflation
• Revisiting astrophysical bounds on continuous spontaneous localization models