Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Braden, Jonathan"'
Autor:
Jenkins, Alexander C., Braden, Jonathan, Peiris, Hiranya V., Pontzen, Andrew, Johnson, Matthew C., Weinfurtner, Silke
Ultracold atomic gases can undergo phase transitions that mimic relativistic vacuum decay, allowing us to empirically test early-Universe physics in tabletop experiments. We investigate the physics of these analog systems, going beyond previous analy
Externí odkaz:
http://arxiv.org/abs/2307.02549
Publikováno v:
1 November 2023 issue of Physical Review D (Vol. 108, No. 9)
Oscillons are localized field configurations oscillating in time with lifetimes orders of magnitude longer than their oscillation period. In this paper, we simulate non-travelling oscillons produced by deforming the breather solutions of the sine-Gor
Externí odkaz:
http://arxiv.org/abs/2303.04750
Autor:
Braden, Jonathan, Johnson, Matthew C., Peiris, Hiranya V., Pontzen, Andrew, Weinfurtner, Silke
Publikováno v:
Phys. Rev. D 107 (2023) 8, 083509
False vacuum decay, a quantum mechanical first-order phase transition in scalar field theories, is an important phenomenon in early universe cosmology. Recently, real-time semi-classical techniques based on ensembles of lattice simulations were appli
Externí odkaz:
http://arxiv.org/abs/2204.11867
False vacuum decay in quantum mechanical first order phase transitions is a phenomenon with wide implications in cosmology, and presents interesting theoretical challenges. In the standard approach, it is assumed that false vacuum decay proceeds thro
Externí odkaz:
http://arxiv.org/abs/2109.04496
Publikováno v:
JCAP 03 (2021) 010
Within the landscape of modified theories of gravity, progress in understanding the behaviour of, and developing tests for, screening mechanisms has been hindered by the complexity of the field equations involved, which are nonlinear in nature and ch
Externí odkaz:
http://arxiv.org/abs/2011.07037
Publikováno v:
MNRAS 495 (2020) 90-97
In this work we investigate the systematic uncertainties that arise from the calculation of the peculiar velocity when estimating the Hubble constant ($H_0$) from gravitational wave standard sirens. We study the GW170817 event and the estimation of t
Externí odkaz:
http://arxiv.org/abs/1909.09609
Autor:
Mahony, Constance, Leistedt, Boris, Peiris, Hiranya V., Braden, Jonathan, Joachimi, Benjamin, Korn, Andreas, Cremonesi, Linda, Nichol, Ryan
Publikováno v:
Phys. Rev. D 101, 083513 (2020)
Recent works combining neutrino oscillation and cosmological data to determine the neutrino hierarchy found a range of odds in favour of the normal hierarchy. These results arise from differing approaches to incorporating prior knowledge about neutri
Externí odkaz:
http://arxiv.org/abs/1907.04331
Autor:
Braden, Jonathan, Johnson, Matthew C., Peiris, Hiranya V., Pontzen, Andrew, Weinfurtner, Silke
Publikováno v:
JHEP 10 (2019) 174
We investigate the nonlinear dynamics of cold atom systems that can in principle serve as quantum simulators of false vacuum decay. The analog false vacuum manifests as a metastable vacuum state for the relative phase in a two-species Bose-Einstein c
Externí odkaz:
http://arxiv.org/abs/1904.07873
Autor:
Braden, Jonathan, Johnson, Matthew C., Peiris, Hiranya V., Pontzen, Andrew, Weinfurtner, Silke
Publikováno v:
Phys. Rev. Lett. 123, 031601 (2019)
We introduce a new picture of vacuum decay which, in contrast to existing semiclassical techniques, provides a real-time description and does not rely on classically-forbidden tunneling paths. Using lattice simulations, we observe vacuum decay via bu
Externí odkaz:
http://arxiv.org/abs/1806.06069
Autor:
Amin, Mustafa A., Braden, Jonathan, Copeland, Edmund J., Giblin Jr, John T., Solorio, Christian, Weiner, Zachary J., Zhou, Shuang-Yong
Publikováno v:
Phys. Rev. D 98, 024040 (2018)
It has been recently suggested that oscillons produced in the early universe from certain asymmetric potentials continue to emit gravitational waves for a number of $e$-folds of expansion after their formation, leading to potentially detectable gravi
Externí odkaz:
http://arxiv.org/abs/1803.08047