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Добірка наукової літератури з теми "Cosmological reheating"

Автор: Grafiati

Опубліковано: 11 березня 2023

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Статті в журналах з теми "Cosmological reheating"

1

Hamazaki, T., and H. Kodama. "Evolution of Cosmological Perturbations during Reheating." Progress of Theoretical Physics 96, no. 6 (1996): 1123–45. http://dx.doi.org/10.1143/ptp.96.1123.

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2

XUE, SHE-SHENG. "GRAVITATIONAL INSTANTON AND COSMOLOGICAL TERM." International Journal of Modern Physics A 24, no. 20n21 (2009): 3865–91. http://dx.doi.org/10.1142/s0217751x09045844.

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Анотація:

Quantum fluctuation of unstable modes about gravitational instantons causes the instability of flat space at finite temperature, leading to the spontaneous process of nucleating quantum black holes. The energy-density of quantum black holes, depending on the initial temperature, gives the cosmological term, which naturally accounts for the inflationary phase of the early universe. The reheating phase is attributed to the Hawking radiation and annihilation of these quantum black holes. Then, the radiation energy-density dominates over the energy-density of quantum black holes, the universe star

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3

Martens, Paul, Shinji Mukohyama, and Ryo Namba. "Reheating after relaxation of large cosmological constant." Journal of Cosmology and Astroparticle Physics 2022, no. 11 (2022): 047. http://dx.doi.org/10.1088/1475-7516/2022/11/047.

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Abstract We present a cosmological model of an early-time scenario that incorporates a relaxation process of the would-be large vacuum energy, followed by a reheating era connecting to the standard hot big bang universe. Avoiding fine-tuning the cosmological constant is achieved by the dynamics of a scalar field whose kinetic term is modulated by an inverse power of spacetime curvature [1,2]. While it is at work against radiative corrections to the dark energy, this mechanism alone would wipe out not only the vacuum energy but also all other matter contents. Our present work aims to complete t

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4

Cheong, Dhong Yeon, Sung Mook Lee, and Seong Chan Park. "Reheating in models with non-minimal coupling in metric and Palatini formalisms." Journal of Cosmology and Astroparticle Physics 2022, no. 02 (2022): 029. http://dx.doi.org/10.1088/1475-7516/2022/02/029.

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Abstract We study reheating of inflationary models with general non-minimal coupling K(ϕ)R with K(ϕ) ∼ √(V(ϕ)) where R is the Ricci scalar and R is the inflaton potential. In particular, when we take the monomial potential K(ϕ) ∝ ϕ m with m∈ℤ+, we provide general analytic expressions for cosmological observables. We consider a wide range of non-minimal coupling ξ∈[0,∞) in metric and Palatini formalisms and derive the predictions for cosmological observables and the reheating temperature taking a general equation of state parameter w reh.

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5

Gasenzer, Thomas, Boris Nowak, and Dénes Sexty. "Charge separation in reheating after cosmological inflation." Physics Letters B 710, no. 4-5 (2012): 500–503. http://dx.doi.org/10.1016/j.physletb.2012.03.031.

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6

Kabir, Rakesh, Amitabha Mukherjee, and Daksh Lohiya. "Reheating constraints on Kähler moduli inflation." Modern Physics Letters A 34, no. 15 (2019): 1950114. http://dx.doi.org/10.1142/s0217732319501141.

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Анотація:

The end of inflation is connected to the standard cosmological scenario through reheating. During reheating, the inflaton oscillates around the minimum of the potential and thus decays into the daughter particles that populate the Universe at later times. Using cosmological evolution for observable CMB scales from the time of Hubble crossing to the present time, we translate the constraint on the spectral index [Formula: see text] from Planck data to the constraint on the reheating scenario in the context of Kähler moduli inflation. We find that the equation of state parameter plays a crucial

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7

Germán, Gabriel, R. Gonzalez Quaglia, and A. M. Moran Colorado. "Model independent bounds for the number of e-folds during the evolution of the universe." Journal of Cosmology and Astroparticle Physics 2023, no. 03 (2023): 004. http://dx.doi.org/10.1088/1475-7516/2023/03/004.

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Abstract We present a simple procedure to obtain universal bounds for quantities of cosmological interest, such as the number of e-folds during inflation, reheating, and radiation, as well as the reheating temperature. The main assumption is to represent each of the various epochs of evolution of the universe as being due to a single substance changing instantaneously into the next, describing a new era of evolution of the universe. This assumption, commonly used to obtain solutions of the Friedmann equations for simple cosmological models, is implemented here to find model-independent bounds

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8

Sakhi, Z., A. Safsafi, M. Ferricha-Alami, H. Chakir, and M. Bennai. "Observational constraints on reheating in braneworld inflation." International Journal of Modern Physics A 34, no. 27 (2019): 1950152. http://dx.doi.org/10.1142/s0217751x19501525.

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Анотація:

The reheating era after inflation is analyzed in the framework of the braneworld models. We study reheating by calculating the reheating temperature in a braneworld inflation for various cosmological parameters. The variation of reheating [Formula: see text]-folding number and reheating temperature were obtained and analyzed as function of a spectrum of perturbation for a polynomial potential [Formula: see text]. We have applied the slow-roll approximation in the high energy limit to constraint the parameter potentials by confronting our results to recent Planck 2018 observations. We have show

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9

Salamate, F., I. Khay, M. Ferricha-Alami, H. Chakir, and M. Bennai. "Reheating Temperature from D-Term Cosmological Inflation Braneworld." Astronomy Reports 63, no. 12 (2019): 990–97. http://dx.doi.org/10.1134/s1063772919120059.

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10

Allahverdi, Rouzbeh, and Bruce A. Campbell. "Cosmological reheating and self-interacting final state bosons." Physics Letters B 395, no. 3-4 (1997): 169–77. http://dx.doi.org/10.1016/s0370-2693(97)00045-2.

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