Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Levkov, D. G."'
Autor:
Levkov, D. G., Maslov, V. E.
Publikováno v:
Phys. Rev. D 108, 063514 (2023)
We develop precise analytic description of oscillons - long-lived quasiperiodic field lumps - in scalar field theories with nearly quadratic potentials, e.g. the monodromy potential. Such oscillons are essentially nonperturbative due to large amplitu
Externí odkaz:
http://arxiv.org/abs/2306.06171
We analytically solve the problem of Bose star growth in the bath of gravitationally interacting particles. We find that after nucleation of this object the bath is described by a self-similar solution of kinetic equation. Together with the conservat
Externí odkaz:
http://arxiv.org/abs/2305.01005
Publikováno v:
J. High Energ. Phys. 2023, 205 (2023)
We compute the probability of producing $n$ particles from few colliding particles in the unbroken $(3+1)$-dimensional $\lambda\phi^4$ theory. To this end we numerically implement semiclassical method of singular solutions which works at ${n \gg 1}$
Externí odkaz:
http://arxiv.org/abs/2212.03268
Publikováno v:
JHEP 12 (2022) 079
We consider oscillons - localized, quasiperiodic, and extremely long-living classical solutions in models with real scalar fields. We develop their effective description in the limit of large size at finite field strength. Namely, we note that nonlin
Externí odkaz:
http://arxiv.org/abs/2208.04334
Publikováno v:
Jetp Lett. 114 (2021) 649 [Pisma Zh.Eksp.Teor.Fiz. 114 (2021) 723]
We develop a numerical method to compute the probabilities of multiparticle production in weakly coupled scalar theories. Our technique is based on D.T. Son's semiclassical method of singular solutions. Applying it to the process $1 \to n$ in the unb
Externí odkaz:
http://arxiv.org/abs/2111.04760
Publikováno v:
Phys. Rev. D 104, 023504 (2021)
Light bosonic (axion-like) dark matter may form Bose stars - clumps of nonrelativistic Bose-Einstein condensate supported by self-gravity. We study rotating Bose stars composed of condensed particles with nonzero angular momentum $l$. We analytically
Externí odkaz:
http://arxiv.org/abs/2104.00962
Publikováno v:
Astrophysical Journal 925, 109 (2022)
We advance theoretical methods for studying propagation effects in the Fast Radio Burst (FRB) spectra. We derive their autocorrelation function in the model with diffractive lensing and strong Kolmogorov-type scintillations and analytically obtain th
Externí odkaz:
http://arxiv.org/abs/2010.15145
Publikováno v:
Chaos, Solitons & Fractals 139, 110079 (2020)
Profiles of static solitons in one-dimensional scalar field theory satisfy the same equations as trajectories of a fictitious particle in multidimensional mechanics. We argue that the structure and properties of the solitons are essentially different
Externí odkaz:
http://arxiv.org/abs/2004.13052
Publikováno v:
Phys. Rev. D 102, 023501 (2020)
We study parametric instability of compact axion dark matter structures decaying to radiophotons. Corresponding objects - Bose (axion) stars, their clusters, and clouds of diffuse axions - form abundantly in the postinflationary Peccei-Quinn scenario
Externí odkaz:
http://arxiv.org/abs/2004.05179
Publikováno v:
Phys. Rev. Lett. 121, 151301 (2018)
We study Bose-Einstein condensation and formation of Bose stars in the virialized dark matter halos/miniclusters by universal gravitational interactions. We prove that this phenomenon does occur and it is described by kinetic equation. We give expres
Externí odkaz:
http://arxiv.org/abs/1804.05857