Zobrazeno 1 - 10
of 224
pro vyhledávání: '"Rybak, I."'
We continue our studies of the evolution and cosmological consequences of current-carrying cosmic string networks, described by a charge-velocity-dependent one scale (CVOS) model. We present a detailed calculation of the effects of these networks on
Externí odkaz:
http://arxiv.org/abs/2403.16332
Autor:
Rybak, I. Yu.
We utilized the duality between massive vector and massive Kalb-Ramond fields to derive an effective action for Abelian-Higgs cosmic strings. This enabled us to determine the classically renormalized string tension and facilitate calculations for bac
Externí odkaz:
http://arxiv.org/abs/2305.08155
We consider the evolution of current-carrying cosmic string networks described by the charge-velocity-dependent one scale (CVOS) model beyond the linear equation of state regime, specifically focusing on the Witten superconducting model. We find that
Externí odkaz:
http://arxiv.org/abs/2304.00053
Autor:
Rybak, I. Yu., Sousa, L.
We study the gravitational radiation emission efficiency $\Gamma$ of superconducting cosmic strings. We demonstrate, by using a solvable model of transonic strings, that the presence of a current leads to a suppression of the gravitational emission o
Externí odkaz:
http://arxiv.org/abs/2209.01068
We apply a recently developed formalism to study the evolution of a current-carrying string network under the simple but generic assumption of a linear equation of state. We demonstrate that the existence of a scaling solution with non-trivial curren
Externí odkaz:
http://arxiv.org/abs/2108.03147
Autor:
Rybak, I. Yu., Sousa, L.
Publikováno v:
Phys. Rev. D 104, 023507 (2021)
We investigate the contribution of cosmic string loops to the Cosmic Microwave Background (CMB) anisotropies. This is done by extending the Unconnected Segment Model (USM) to include the contribution of the cosmic string loops created throughout the
Externí odkaz:
http://arxiv.org/abs/2104.08375
Publikováno v:
Phys. Rev. D 103, 043538 (2021)
We develop an analytic model to quantitatively describe the evolution of superconducting cosmic string networks. Specifically, we extend the velocity-dependent one-scale (VOS) model to incorporate arbitrary currents and charges on cosmic string world
Externí odkaz:
http://arxiv.org/abs/2011.09700
Autor:
Rybak, I. Yu.
Publikováno v:
Phys. Rev. D 102, 083516 (2020)
We studied the formation of Y-junctions for transonic elastic strings. In particular, using the gen-eral solution for these strings, which is described by left- and right-moving modes, we obtained thedynamics of kinks and Y-junctions. Considering the
Externí odkaz:
http://arxiv.org/abs/2001.07262
Publikováno v:
Phys. Rev. D 99, 063516 (2019)
The dynamics of string junctions and their influence on the evolution of cosmic superstring networks are studied in full detail. We review kinematic constraints for colliding strings in a Friedmann-Lema\^itre-Robertson-Walker background and obtain th
Externí odkaz:
http://arxiv.org/abs/1812.04584
Publikováno v:
Phys. Rev. D 98, 063519 (2018)
We present an analytic study of cosmic superconducting chiral string collisions in Minkowski space, applying the kinematic constraints that arise from the relevant generalization of the Nambu-Goto action. In particular, we revisit the solution for ch
Externí odkaz:
http://arxiv.org/abs/1809.04033