Zobrazeno 1 - 10
of 151 992
pro vyhledávání: '"P, Roll"'
Autor:
Kashyap, Mruganka
Vehicle roll control has been a well studied problem. One of the ubiquitous methods to mitigate vehicle rollover in the automobile industry is via a mechanical anti-roll bar. However with the advent of electric vehicles, rollover mitigation can be pu
Externí odkaz:
http://arxiv.org/abs/2411.04510
We investigate ultra slow-roll inflation in a black hole background finding a correspondence between scalar solutions of ultra slow-roll inflation and quasi-normal modes of the cosmological black hole spacetime. Transitions from slow-roll to ultra sl
Externí odkaz:
http://arxiv.org/abs/2411.04806
Violating the slow-roll regime during the final stages of inflation can significantly enhance curvature perturbations, a scenario often invoked in models producing primordial black holes and small-scale scalar induced gravitational waves. When pertur
Externí odkaz:
http://arxiv.org/abs/2410.23942
Autor:
Ruiz, Juan Álvarez, Rey, Julián
We compute the non-Gaussian corrections to the energy density and anisotropies of gravitational waves induced after an ultra-slow-roll phase of inflation by using a diagrammatic approach, and present the corresponding Feynman rules. Our two-loop calc
Externí odkaz:
http://arxiv.org/abs/2410.09014
Motivated by the aim of producing significant number of primordial black holes, over the past few years, there has been a considerable interest in examining models of inflation involving a single, canonical field, that permit a brief period of ultra
Externí odkaz:
http://arxiv.org/abs/2409.20232
Building on previous work on de Sitter extremal surfaces anchored at the future boundary, we study no-boundary extremal surfaces in slow-roll inflation models, with perturbations to no-boundary global $dS$ preserving the spatial isometry. While in pu
Externí odkaz:
http://arxiv.org/abs/2409.14208
Ground-roll wave is a common coherent noise in land field seismic data. This Rayleigh-type surface wave usually has low frequency, low apparent velocity, and high amplitude, therefore obscures the reflection events of seismic shot gathers. Commonly u
Externí odkaz:
http://arxiv.org/abs/2409.03878
Autor:
Jackson, Joseph H. P., Assadullahi, Hooshyar, Gow, Andrew D., Koyama, Kazuya, Vennin, Vincent, Wands, David
We simulate the distribution of very rare, large excursions in the primordial density field produced in models of inflation in the very early universe which include a strong enhancement of the power spectrum. The stochastic $\delta \mathcal{N}$ forma
Externí odkaz:
http://arxiv.org/abs/2410.13683
The curvature perturbation in a model of constant-roll (CR) inflation is interpreted in view of the logarithmic duality discovered in Ref. [1] according to the $\delta N$ formalism. We confirm that the critical value $\beta:=\ddot{\varphi}/(H\dot{\va
Externí odkaz:
http://arxiv.org/abs/2409.13500
We consider slow-roll inflation in the context of a modified Brans-Dicke dilaton gravity. From a two self-interacting potentials $V(\phi)$, we reproduce a Starobinsky-like potential and, commonly in syperstring models, an exponential tail potential $
Externí odkaz:
http://arxiv.org/abs/2409.02975