Zobrazeno 1 - 10
of 153 389
pro vyhledávání: '"Roll, P."'
We analyse the evolution of the reduced density matrix of inflationary perturbations, coupled to a heavy entropic field via the leading-order term within the Effective Field Theory of Inflation, for two nearly de Sitter backgrounds. We perform a full
Externí odkaz:
http://arxiv.org/abs/2411.08632
Autor:
Sharma, Devanshu
Stochastic inflation, together with the $\Delta N$ formalism, provides a powerful tool for estimating the large-scale behaviour of primordial fluctuations. We construct a numerical code to capture the non-perturbative statistics of such fluctuations
Externí odkaz:
http://arxiv.org/abs/2411.08854
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
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
Autor:
Autieri, Gabriele, Redi, Michele
We present new single field inflationary scenarios that produce the critical abundance of primordial black holes as dark matter reconstructing the inflaton potential from an input power spectrum. The method is exact in the slow roll approximation but
Externí odkaz:
http://arxiv.org/abs/2408.12587
Publikováno v:
Alexandria Engineering Journal, Vol 104, Iss , Pp 279-291 (2024)
Products coated with flexible film can be stored in wound rolls after the winding process. However, if the roll product experiences excessive internal stress, it can lead to various defects in the coated layer. To alleviate the stress within the woun
Externí odkaz:
https://doaj.org/article/421d7276241b47a8a33c6c26bf0ac019
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