Zobrazeno 1 - 10
of 2 126
pro vyhledávání: '"P Rigopoulos"'
We formulate a generalized self-consistent quantum kinetic theory including thermal fluctuations and stochastic contributions for modelling ultracold Bose gases interacting via a generic long-range interaction. Our generalised equations take the usua
Externí odkaz:
http://arxiv.org/abs/2407.20178
We extend our previous work (Proukakis {\em et al.}, Phys.~Rev.~D~108,~083513 (2023)) on the dynamics of bosonic, non-relativistic and self-interacting dark matter that simultaneously contains both a ``fuzzy'' low-momentum component and one with high
Externí odkaz:
http://arxiv.org/abs/2407.08860
We provide a formulation of Stochastic Inflation in full general relativity that goes beyond the slow-roll and separate universe approximations. We show how gauge invariant Langevin source terms can be obtained for the complete set of Einstein equati
Externí odkaz:
http://arxiv.org/abs/2401.08530
We investigate the effect of self-interactions on the shape and oscillations of the solitonic core profile of condensed fuzzy dark matter systems without the backdrop of a halo, revealing universal features in terms of an appropriately scaled interac
Externí odkaz:
http://arxiv.org/abs/2312.14917
We analyse perturbations of self-interacting, scalar field dark matter that contains modes both in a coherent condensate state and an incoherent particle-like state. Starting from the coupled equations for the condensate, the particles' phase space d
Externí odkaz:
http://arxiv.org/abs/2311.05280
We derive from first principles equations for bosonic, non-relativistic and self-interacting dark matter which can include both a condensed, low momentum "fuzzy" component and one with higher momenta that may be approximated as a collection of partic
Externí odkaz:
http://arxiv.org/abs/2303.02049
Autor:
Rigopoulos, Gerasimos, Wilkins, Ashley
We use Functional Renormalisation Group (FRG) techniques to analyse the behaviour of a spectator field, $\sigma$, during inflation that obeys an overdamped Langevin equation. We briefly review how a derivative expansion of the FRG can be used to obta
Externí odkaz:
http://arxiv.org/abs/2211.09649
Publikováno v:
Monthly Notices of the Royal Astronomical Society 521 (3), 3625-3647, 2023
We show that fuzzy dark matter halos exhibit spatial differentiation in the degree of coherence of the field configuration, ranging from completely coherent in the central solitonic core to incoherent outside it, with a crossover region in between th
Externí odkaz:
http://arxiv.org/abs/2211.02565
Autor:
Xiaoyan Wei, Angelos Rigopoulos, Matthias Lienhard, Sophie Pöhle-Kronawitter, Georgios Kotsaris, Julia Franke, Nikolaus Berndt, Joy Orezimena Mejedo, Hao Wu, Stefan Börno, Bernd Timmermann, Arunima Murgai, Rainer Glauben, Sigmar Stricker
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-19 (2024)
Abstract Patients affected by neurofibromatosis type 1 (NF1) frequently show muscle weakness with unknown etiology. Here we show that, in mice, Neurofibromin 1 (Nf1) is not required in muscle fibers, but specifically in early postnatal myogenic proge
Externí odkaz:
https://doaj.org/article/b7287db86f044a2d8712189b7e32a135
Autor:
Rigopoulos, Gerasimos, Wilkins, Ashley
We use the Hamilton-Jacobi (H-J) formulation of stochastic inflation to describe the evolution of the inflaton during a period of Ultra-Slow Roll (USR), taking into account the field's velocity and its gravitational backreaction. We demonstrate how t
Externí odkaz:
http://arxiv.org/abs/2107.05317