Results 81 to 90 of about 49,682 (257)

Phenomenological Inflationary Model in Supersymmetric Quantum Cosmology

Universe, 2022
We consider the effective evolution of a phenomenological model from FLRW supersymmetric quantum cosmology with a scalar field. The scalar field acts as a clock and inflaton.
Nephtalí E. Martínez-Pérez, Cupatitzio Ramírez-Romero, Víctor M. Vázquez-Báez   +2 more
doaj   +1 more source

Lectures on Cosmic Inflation and its Potential Stringy Realizations

, 2007
These notes present a brief introduction to Hot Big Bang cosmology and Cosmic Inflation, together with a selection of some recent attempts to embed inflation into string theory.
Acharya B S, Achucarro A, Alabidi L Lyth D H, Allahverdi R, Avgoustidis A Cremades D Quevedo F, Balasubramanian V, Barnaby N, Barnaby N Cline J M, Baumann D Dymarsky A Klebanov I McAllister L Steinhardt P, Baumann D Dymarsky A Klebanov I R Maldacena J McAllister L Murugan A, Baumann D Dymarsky A Klebanov I R McAllister L, Becker K, Berg M, Berg M Haack M Pajer E, Blanco-Pillado J J, Blanco-Pillado J J, Blanco-Pillado J J, Brandenberger R H Nayeri A Patil S P Vafa C, Brax Ph van de Bruck C Davis A C Davis S C Jeannerot R Postma M, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P, Burgess C P Holman R Hoover D, C P Burgess, Chen C M, Chen P, Chen X G, Chen X G, Chen X Tye S H, Chialva D, Cline J M, Conlon J P, Conlon J P, Conlon J P, Conlon J P Quevedo F, Copeland E J, Cremades D, Cremades D, Cremades D, Dasgupta K, Dasgupta K, Dasgupta K Hsu J P Kallosh R Linde A Zagermann M, de Carlos B, Denef F, Denef F Douglas M R Florea B Grassi A Kachru S, Denef F Douglas M R Florea B Grassi A Kachru S, DeWolfe O, Dimopoulos S Kachru S McGreevy J Wacker J G, Dodelson S, Dudas E, Dvali G, Dvali G, Dvali G R Shafi Q Solganik S, Enqvist K Mether L Nurmi S, Firouzjahi H, Freivogel B, Garcia-Bellido J, Gomez-Reino M, Green M B, Greene B Weltman A, Grishchuk L P, Herdeiro C, Hsu J P, Hsu J P, Iizuka N Trivedi S P, Jones N, Kachru S, Kachru S, Kallosh R, Kallosh R, Kallosh R, Kallosh R, Kaloper N, Kaloper N, Kinney W H, Kofman L, Kolb E W, Koyama F Tachikawa Y Watari T, Krause A Pajer E, Lalak Z, Lalak Z Langlois D Pokorski S Turzynski K, Lalak Z Ross G G Sarkar S, Langfelder P, Leblond L, Liddle A R, Linde A, Linde A, Linde A, Linde A, Linde A D, Linde A D, Lyth D H, McAllister L, Mukhanov V, Peebles P J E, Peiris H V Baumann D Friedman B Cooray A, Pilo L, Polarski D, Polchinski J, Polchinski J Efthimiou C Greene B, Postma M, Quevedo F, Ryden B, Saltman A, Shandera S E Tye S H, Simon J Jimenez R Verde L Berglund P Balasubramanian V, Spergel D N, Steinhardt P J, Tasinato G, Terning J, Tye S H H, Villadoro G, Weinberg S, Weinberg S, Westphal A, Westphal A, Zweibach B   +125 more
core   +1 more source

Tachyacoustic cosmology: An alternative to inflation [PDF]

Physical Review D, 2010
11 pages, LaTeX (V2: references added. Version submitted to PRD)
Bessada, Dennis, Kinney, William H., Stojkovic, Dejan, Wang, John   +3 more
openaire   +2 more sources

Exploring the Formation and Age of Irregular Mare Patches (IMPs) to the Southeast of the Chang'e‐5 Landing Site

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Recently, possible exceptionally young mare volcanic glass beads were discovered in Chang'e‐5 (CE‐5) samples. Isotopic dating suggests an age of approximately 120 Ma, presenting new challenges to existing lunar thermal evolution models. Thus, our research focuses on the source region of Rima Mairan, a branch of Rima Sharp, and its surrounding ...
Zhonglu Lei, Zhizhong Kang, Teng Hu, C. H. van der Bogert, Jinghao Cai, Xiaojian Xu, Harald Hiesinger   +6 more
wiley   +1 more source

Lectures on string theory and cosmology

, 2004
In these lectures I review recent attempts to apply string theory to cosmology, including string cosmology and various models of brane cosmology. In addition, the review includes an introduction to inflation as well as a discussion of transplanckian ...
Albrecht A Kaloper N Song Y S, Allen B, Bak D, Banks T, Banks T, Banks T Fischler W, Banks T Fischler W, Banks T Susskind L, Bekenstein J D, Bergström L, Bousso R, Bousso R, Bousso R, Bousso R, Bozza V, Brandenberger R H, Burgess C P, Chernikov N A, Danielsson U H, Danielsson U H, Danielsson U H, Danielsson U H, Danielsson U H, de Boer J, DeWolfe O, Dvali G R Shafi Q Solganik S, Dyson L, Dyson L, Easther R, Fischler W, Fischler W Susskind L, Frolov A, Gasperini M, Gibbons G W, Giddings S B, Goldstein K, Grishchuk L P, Grishchuk L P, Guth A H, Hellerman S, Horowitz G T, Kachru S, Kachru S, Kaloper N, Kaloper N, Keski-Vakkuri E, Kiefer C, Kruczenski M, Liddle A R, Linde A, Linde A, Linde A, Martin J, Martin J, Mottola E, Myung Y S, Okamoto T, Polarski D, Polchinski J, Prokopec T, Quevedo F, Sato K, Schalm K, Schiffer M, Starobinsky A A, Starobinsky A A, Starobinsky A A, Steinhardt P J Turok N, Susskind L, Susskind L, Susskind L, Turok N, Ulf H Danielsson, Witten E, Witten E   +74 more
core   +2 more sources

Axion Black Hole Solution in Non‐Metricity Gravity

Fortschritte der Physik, Volume 74, Issue 2, February 2026.
Abstract A static, spherically symmetric black hole solution in symmetric teleparallel (non‐metricity) gravity sourced by an axion field is constructed. Starting from the modified field equations, exact configurations are obtained characterized by the mass M$M$ and an axion–geometry coupling β$\beta$, with temporal metric function A(r)=1−2Mr+βr$A(r)=1-\
A. Eid, G.G.L. Nashed
wiley   +1 more source

Classicalization of quantum fluctuations at the Planck scale in the Rh = ct universe

Physics Letters B, 2021
The quantum to classical transition of fluctuations in the early universe is still not completely understood. Some headway has been made incorporating the effects of decoherence and the squeezing of states, though the methods and procedures continue to ...
Fulvio Melia
doaj   +1 more source

Will quantum cosmology resurrect chaotic inflation model?

, 2016
The single field chaotic inflation model with a monomial power greater than one seems to be ruled out by the recent Planck and WMAP CMB data while Starobinsky model with a higher curvature term seems to be a viable model.
Kim, Sang Pyo, Kim, Won
core   +1 more source

Decameter‐Sized Earth Impactors—II: A Bayesian Inference Approach to Meteoroid Ablation Modeling

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Small asteroids and large meteoroids frequently impact the Earth, though their physical and material properties remain poorly understood. When observed as fireballs in Earth's atmosphere, these properties can be inferred from their ablation and fragmentation behavior.
Ian Chow, Peter G. Brown
wiley   +1 more source

Dynamical dark energy in 0’B braneworlds

European Physical Journal C: Particles and Fields
We build a novel realization of dark bubble cosmology in non-supersymmetric string theory. Among the simplest models in ten dimensions, the type 0’B orientifold is the unique option which yields a scale-separated construction.
Ivano Basile, Alessandro Borys, Joaquin Masias   +2 more
doaj   +1 more source