Efeitos Não-Lineares: uma nova janela para o Universo primordial
DOI:
https://doi.org/10.47456/Cad.Astro.v7nEspecial.53347Palabras clave:
Inflação, Formalismo Estocástico, Buracos Negros Primordiais, Colapso Estocástico.Resumen
A compreensão do universo primordial é fundamental para conectar física de altas energias, cosmologia observacional e formação das estruturas cósmicas. Neste trabalho, discuto o formalismo estocástico aplicado à inflação e a cenários alternativos de colapso, destacando sua capacidade de acessar efeitos não-lineares na distribuição primordial de densidade. Apresento aplicações na produção de buracos negros primordiais (PBHs), incluindo o cenário do curvaton fortemente não-gaussiano, e discuto a estabilidade quântica de modelos colapsantes. Aponto ainda limitações conceituais do formalismo e perspectivas de investigação neste tópicos.
Referencias
[1] N. Aghanim et al., Planck 2018 results. I. Overview and the cosmological legacy of Planck, Astron. Astrophys. 641, A1 (2020).
[2] J. P. Gardner, J. C. Mather, M. Clampin, R. Doyon, M. A. Greenhouse, H. B. Hammel, J. B. Hutchings, P. Jakobsen, S. J. Lilly, K. S. Long et al., The James Webb Space Telescope, Space Sci. Rev. 123, 485 (2006).
[3] Z. Ivezic et al., LSST: From Science Drivers to Reference Design, Astrophys. J. 873, 111 (2019).
[4] R. Braun, A. Bonaldi, T. Bourke, E. Keane e J. Wagg, Anticipated Performance of the Square Kilometre Array – Phase 1 (SKA1), arXiv (2019).
[5] B. P. Abbott et al., Observation of Gravitational Waves from a Binary Black Hole Merger, Phys. Rev. Lett. 116, 061102 (2016).
[6] F. Acernese et al., Advanced Virgo: a second-generation interferometric gravitational wave detector, Class. Quant. Grav. 32,
[7] Y. Aso et al., Interferometer design of the KAGRA gravitational wave detector, Phys. Rev. D 88, 043007 (2013).
[8] P. Amaro-Seoane et al., Laser Interferometer Space Antenna, arXiv (2017).
[9] E. W. Kolb e M. S. Turner, The Early Universe (Addison-Wesley, 1990).
[10] J. Lesgourgues, G. Mangano, G. Miele e S. Pastor, Neutrino Cosmology (Cambridge University Press, 2013).
[11] G. Bertone, D. Hooper e J. Silk, Particle dark matter: Evidence, candidates and constraints, Phys. Rept. 405, 279 (2005).
[12] D. Baumann, TASI Lectures on Inflation, arXiv (2009).
[13] Y. Akrami et al., Planck 2018 results. X. Constraints on inflation, Astron. Astrophys. 641, A10 (2020).
[14] V. Vennin e A. A. Starobinsky, Correlation Functions in Stochastic Inflation, Eur. Phys. J. C 75, 413 (2015).
[15] J. M. Ezquiaga, J. Garcia-Bellido e V. Vennin, The exponential tail of inflationary fluctuations: consequences for primordial black holes, JCAP 03, 029 (2020).
[16] T. Miranda, E. Frion e D. Wands, Stochastic collapse, JCAP 01, 026 (2020).
[17] A. A. Starobinsky, A new type of isotropic cosmological models without singularity, Phys. Lett. B 91, 99 (1980).
[18] K. Sato, First-order phase transition of a vacuum and expansion of the Universe, Mon. Not. Roy. Astron. Soc. 195, 467 (1981).
[19] A. H. Guth, The Inflationary Universe: A Possible Solution to the Horizon and Flatness Problems, Phys. Rev. D 23, 347 (1981).
[20] A. D. Linde, A New Inflationary Universe Scenario, Phys. Lett. B 108, 389 (1982).
[21] J. Grain e V. Vennin, Stochastic inflation in phase space: Is slow roll a stochastic attractor?, JCAP 05, 045 (2017).
[22] S. W. Hawking, The Development of Irregularities in a Single Bubble Inflationary Universe, Phys. Lett. B 115, 295 (1982).
[23] A. A. Starobinsky, Dynamics of phase transition in the new inflationary universe scenario and generation of perturbations, Phys. Lett. B 117, 175 (1982).
[24] A. H. Guth e S.-Y. Pi, Fluctuations in the New Inflationary Universe, Phys. Rev. Lett. 49, 1110 (1982).
[25] M. Sasaki, Large Scale Quantum Fluctuations in the Inflationary Universe, Prog. Theor. Phys. 76, 1036 (1986).
[26] V. F. Mukhanov, Quantum Theory of Gauge Invariant Cosmological Perturbations, JETP Lett. 41, 493 (1985).
[27] A. A. Starobinsky, Multicomponent de Sitter (inflationary) stages and the generation of perturbations, JETP Lett. 42, 152 (1985).
[28] M. Sasaki e E. D. Stewart, A General analytic formula for the spectral index of the density perturbations produced during inflation, Prog. Theor. Phys. 95, 71 (1996).
[29] D. H. Lyth e Y. Rodriguez, The inflationary prediction for primordial non-Gaussianity, Phys. Rev. Lett. 95, 121302 (2005).
[30] A. A. Starobinsky, Stochastic de Sitter (inflationary) stage in the early universe, Lect. Notes Phys. 246, 107 (1986).
[31] A. A. Starobinsky e J. Yokoyama, Equilibrium state of a self-interacting scalar field in the de Sitter background, Phys. Rev. D 50, 6357 (1994).
[32] T. Markkanen, A. Rajantie, S. Stopyra e T. Tenkanen, Scalar correlation functions in de Sitter space from the stochastic spectral expansion, JCAP 08, 001 (2019).
[33] B. J. Carr, The Primordial black hole mass spectrum, Astrophys. J. 201, 1 (1975).
[34] I. Musco, Threshold for primordial black holes: Dependence on the shape of the cosmological perturbations, Phys. Rev. D 100, 123514 (2019)
[35] S. Young, I. Musco e C. T. Byrnes, Primordial black hole formation and abundance: contribution from the non-linear relation between the density and curvature perturbation, JCAP 11, 012 (2019).
[36] K. Enqvist, R. N. Lerner, O. Taanila e A. Tranberg, Spectator field dynamics in de Sitter and curvaton initial conditions, JCAP 10, 052 (2012).
[37] D. H. Lyth e D. Wands, Generating the curvature perturbation without an inflaton, Phys. Lett. B 524, 5 (2002).
[38] T. Moroi e T. Takahashi, Effects of cosmological moduli fields on cosmic microwave background, Phys. Lett. B 522, 215 (2001).
[39] K. Enqvist e M. S. Sloth, Adiabatic CMB perturbations in pre-Big Bang string cosmology, Nucl. Phys. B 626, 395 (2002).
[40] A. D. Gow, T. Miranda e S. Nurmi, Primordial black holes from a curvaton scenario with strongly non-Gaussian perturbations, JCAP 11, 006 (2023).
[41] M. Novello e J. M. Salim, Non-singular cosmological models, Phys. Rev. D 20, 377 (1979).
[42] V. N. Melnikov e S. V. Orlov, Nonsingular cosmological models with a bounce, Phys. Lett. A 70, 263 (1979).
[43] J. J. Halliwell, Scalar fields in cosmology with an exponential potential, Phys. Lett. B 185, 444 (1987).
[44] E. J. Copeland, A. R. Liddle e D. Wands, Exponential potentials and cosmological scaling solutions, Phys. Rev. D 57, 123505 (1998).
[45] I. P. C. Heard e D. Wands, Cosmology with positive and negative exponential potentials, Class. Quant. Grav. 19, 5435 (2002).
[46] A. A. Starobinsky, Spectrum of relict gravitational radiation and the early state of the universe, JETP Lett. 30, 682 (1979).
[47] D. Wands, Cosmological perturbations through the big bang, Phys. Rev. D 60, 023507 (1999).
[48] J. Grain e V. Vennin, Unavoidable shear from quantum fluctuations in contracting cosmologies, Eur. Phys. J. C 81, 132 (2021).
[49] C. Pattison, V. Vennin e D. Wands, Quantum diffusion during inflation and primordial black holes, JCAP 10, 011 (2019).
Descargas
Publicado
Número
Sección
Licencia
Derechos de autor 2026 Tays Miranda
Esta obra está bajo una licencia internacional Creative Commons Atribución 4.0.
