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pro vyhledávání: '"Biondini, A"'
We demonstrate how a dark sector can provide a crucial link between a vacuum-dominated early universe and the later radiation-dominated epoch. As an example, we consider a feeble axion-like coupling of dark non-Abelian gauge fields with a single infl
Externí odkaz:
http://arxiv.org/abs/2406.10345
We study an initial-boundary-value problem (IBVP) for a system of coupled Maxwell-Bloch equations (CMBE) that model two colors or polarizations of light resonantly interacting with a degenerate, two-level, active optical medium with an excited state
Externí odkaz:
http://arxiv.org/abs/2405.10117
Publikováno v:
Proceedings of Science (PoS) 2024
For a quantitative investigation on the time evolution of heavy thermal dark matter at and after thermal freeze-out, near-threshold processes need to be taken into account which have a large impact on the observed dark matter relic abundance. In this
Externí odkaz:
http://arxiv.org/abs/2402.14199
For non-relativistic thermal dark matter, close-to-threshold effects largely dominate the evolution of the number density for most of the times after thermal freeze-out, and hence affect the cosmological relic density. A precise evaluation of the rel
Externí odkaz:
http://arxiv.org/abs/2402.12787
In the present work we revisit the shock wave dynamics in a granular chain with precompression. By approximating the model by an $\alpha$-Fermi-Pasta-Ulam-Tsingou chain, we leverage the connection of the latter in the strain variable formulation to t
Externí odkaz:
http://arxiv.org/abs/2402.08218
The aim of this work is multifold. Firstly, it intends to present a complete, quantitative and self-contained description of the periodic traveling wave solutions and Whitham modulation equations for the Toda lattice, combining results from different
Externí odkaz:
http://arxiv.org/abs/2312.10755
Autor:
Biondini, Gino, Zhang, Zechuan
The inverse spectral theory for a self-adjoint one-dimensional Dirac operator associated periodic potentials is formulated via a Riemann-Hilbert problem approach. The resulting formalism is also used to solve the initial value problem for the nonline
Externí odkaz:
http://arxiv.org/abs/2311.18127
The inverse scattering transform is developed to solve the Maxwell-Bloch system of equations that describes two-level systems with inhomogeneous broadening, in the case of optical pulses that do not vanish at infinity in the future. The direct proble
Externí odkaz:
http://arxiv.org/abs/2311.06867
Autor:
Biondini, Simone
A novel particle has been and still is an intriguing option to explain the strong evidence for dark matter in our universe. To quantitatively predict the dark matter energy density, two main ingredients are needed: interaction rates and an expansion
Externí odkaz:
http://arxiv.org/abs/2309.00323
Indirect detection is one of the most powerful methods to search for annihilating dark matter. In this work, we investigate the impact of non-perturbative effects in the indirect detection of dark matter. For this purpose we utilize a minimal model c
Externí odkaz:
http://arxiv.org/abs/2308.14594