Results 91 to 100 of about 165,969,103 (172)

Cosmic clues: DESI, dark energy, and the cosmological constant problem

Journal of High Energy Physics
Several attempts to solve the cosmological constant problem, which concerns the value of the cosmological constant being extremely smaller than the Standard Model mass scales, have introduced a scalar field with a very flat potential that can be ...
Wen Yin
doaj   +1 more source

Modulated reheating and large non-gaussianity in string cosmology [PDF]

, 2012
A generic feature of the known string inflationary models is that the same physics that makes the inflaton lighter than the Hubble scale during inflation often also makes other scalars this light.
CICOLI, MICHELE, I. Zavala, Burgess, C. P., Quevedo, F., C. P. Burgess, Cicoli, M., Tasinato, G., Zavala, I., G. Tasinato, F. Quevedo   +9 more
core   +1 more source

Inching toward the QCD axions with axion magnetic resonance in helioscopes

Journal of High Energy Physics
Utilizing a helical magnet profile to enhance axion-photon conversion showed great promise in laboratory searches for high axion masses. We extend the mechanism, known as the axion-magnetic resonance (AMR), from laser experiments to axion helioscopes and
Hyeonseok Seong, Chen Sun, Seokhoon Yun
doaj   +1 more source

Resonant Landau-Zener conversion in multi-axion systems

Journal of High Energy Physics
Multiple axions may emerge in the low-energy effective theory of Nature. Generically, the potentials describing these axion fields are non-diagonal, leading to mass mixing between axion states which can be temperature-dependent due to QCD instanton ...
David I. Dunsky, Claudio Andrea Manzari, Pablo Quílez, Maria Ramos, Philip Sørensen   +4 more
doaj   +1 more source

Mobility Extension for Broadband Satellite Multimedia [PDF]

, 2009
This paper presents an extension for Broadband Satellite Multimedia (BSM) to support Mobility Management (MM). To support seamless handovers, mobility related entities are proposed in the Satellite Independent Access Function (SIAF) defined over the SI ...
Hu, Y. Fun, Y. Fun Hu, Prashant Pillai, Berioli, Matteo, Matteo Beriolli, Pillai, Prashant   +5 more
core   +1 more source

Detection of early-universe gravitational-wave signatures and fundamental physics. [PDF]

Gen Relativ Gravit, 2022
Caldwell R, Cui Y, Guo HK, Mandic V, Mariotti A, No JM, Ramsey-Musolf MJ, Sakellariadou M, Sinha K, Wang LT, White G, Zhao Y, An H, Bian L, Caprini C, Clesse S, Cline JM, Cusin G, Fornal B, Jinno R, Laurent B, Levi N, Lyu KF, Martinez M, Miller AL, Redigolo D, Scarlata C, Sevrin A, Haghi BSE, Shu J, Siemens X, Steer DA, Sundrum R, Tamarit C, Weir DJ, Xie KP, Yang FW, Zhou S.   +37 more
europepmc   +1 more source

The deep space quantum link: prospective fundamental physics experiments using long-baseline quantum optics. [PDF]

EPJ Quantum Technol, 2022
Mohageg M, Mazzarella L, Anastopoulos C, Gallicchio J, Hu BL, Jennewein T, Johnson S, Lin SY, Ling A, Marquardt C, Meister M, Newell R, Roura A, Schleich WP, Schubert C, Strekalov DV, Vallone G, Villoresi P, Wörner L, Yu N, Zhai A, Kwiat P.   +21 more
europepmc   +1 more source

braneworld cosmology and holography [PDF]

, 2002
This thesis is devoted to studying two important aspects of braneworld physics: their cosmology and their holography. We examine the Einstein equations induced on a general (n - 2)-brane of arbitrary tension, embedded in some n-dimensional bulk.
Padilla, Antonio
core  

Ultra-high frequency gravitational waves from scattering, Bremsstrahlung and decay during reheating

Journal of High Energy Physics
We investigate ultra-high frequency gravitational waves (GWs) from gravitons generated during inflationary reheating. Specifically, we study inflaton scattering with its decay product, where the couplings involved in this 2 → 2 scattering are the same as
Yong Xu
doaj   +1 more source

Gravitational production of heavy particles during and after inflation

Journal of High Energy Physics
We investigate the gravitational production of a scalar field χ with a mass exceeding the Hubble scale during inflation m χ ≳ H I , employing both analytical and numerical approaches.
Davide Racco, Sarunas Verner, Wei Xue
doaj   +1 more source