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pro vyhledávání: '"Burrage A"'
Wave-like dark matter may feature quadratic couplings to ordinary matter. This carries profound consequences for the phenomenologies of such models. It changes the dark matter density around dense objects made from ordinary matter such as planets and
Externí odkaz:
http://arxiv.org/abs/2410.23350
$f(R)$ theories of modified gravity may be compatible with current observations if the deviations from general relativity are sufficiently well screened in dense environments. In recent work [arXiv:2310.19955] we have shown that approximations common
Externí odkaz:
http://arxiv.org/abs/2409.10623
Autor:
McKay, Sam, Kuhn, Stephen J., Shen, Jiazhou, Li, Fankang, Doskow, Jak, Visser, Gerard, Parnell, Steven R., Burrage, Kaleb, Funama, Fumiaki, Pynn, Roger
We present a resonant-mode, transverse-field, radio-frequency (rf) neutron spin flipper design that uses high-temperature superconducting films to ensure sharp transitions between uniform magnetic field regions. Resonant mode allows for low power, hi
Externí odkaz:
http://arxiv.org/abs/2408.02438
In this work, we explore the properties and shadows of spin-induced scalarized black holes, as well as investigate how a Ricci coupling influences them. Our findings reveal significant deviations from the Kerr metric in terms of the location and geod
Externí odkaz:
http://arxiv.org/abs/2403.14596
Publikováno v:
J. Sci. Comput. 99 (2024) 48
In this paper we consider the numerical solution of fractional differential equations. In particular, we study a step-by-step graded mesh procedure based on an expansion of the vector field using orthonormal Jacobi polynomials. Under mild hypotheses,
Externí odkaz:
http://arxiv.org/abs/2310.10526
We consider the phase shift in the gravitational wave signal induced by fast oscillations of scalar dark matter surrounding binary systems, which could be probed by the future experiments LISA and DECIGO. This effect depends on the local matter densi
Externí odkaz:
http://arxiv.org/abs/2402.04819
In this paper we introduce a new method based on a library of chemical reactions for constructing a system of ordinary differential equations from stochastic simulations arising from an agent-based model. The advantage of this approach is that this l
Externí odkaz:
http://arxiv.org/abs/2308.16431
Publikováno v:
Journal of Cosmology and Astroparticle Physics, Volume 2024, Issue 04, id.004, 32 pp
Screening mechanisms allow light scalar fields to dynamically avoid the constraints that come from our lack of observation of a long-range fifth force. Galactic scale tests are of particular interest when the light scalar is introduced to explain the
Externí odkaz:
http://arxiv.org/abs/2310.19955
Autor:
Burrage, Clare, Millington, Peter
Publikováno v:
Annals N.Y.Acad.Sci. 1531 (2024) 1, 95-103
We consider the theory of a light conformally coupled scalar field, i.e., one that is coupled directly to the Ricci scalar of the gravitational sector. This theory can be written equivalently as one of a light scalar that is coupled to the Standard M
Externí odkaz:
http://arxiv.org/abs/2310.12071
Stability switching in Lotka-Volterra and Ricker-type predator-prey systems with arbitrary step size
Dynamical properties of numerically approximated discrete systems may become inconsistent with those of the corresponding continuous-time system. We present a qualitative analysis of the dynamical properties of two species Lotka-Volterra and Ricker-t
Externí odkaz:
http://arxiv.org/abs/2303.00967