Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Megevand, Miguel"'
Autor:
Alcubierre, Miguel, Barranco, Juan, Bernal, Argelia, Degollado, Juan Carlos, Diez-Tejedor, Alberto, Megevand, Miguel, Núñez, Darío, Sarbach, Olivier
We construct boson star configurations in quantum field theory using the semiclassical gravity approximation. Restricting our attention to the static case, we show that the semiclassical Einstein-Klein-Gordon system for a {\it single real quantum} sc
Externí odkaz:
http://arxiv.org/abs/2212.02530
Autor:
Jaramillo, Víctor, Sanchis-Gual, Nicolas, Barranco, Juan, Bernal, Argelia, Degollado, Juan Carlos, Herdeiro, Carlos, Megevand, Miguel, Núñez, Darío
Fully non-linear numerical evolutions of the Einstein-(multi)--Klein-Gordon equations are performed to study head-on collisions of $\ell$-boson stars. Despite being spherically symmetric, $\ell$-boson stars have a (hidden) frame of reference, used in
Externí odkaz:
http://arxiv.org/abs/2202.00696
Autor:
Alcubierre, Miguel, Barranco, Juan, Bernal, Argelia, Degollado, Juan Carlos, Diez-Tejedor, Alberto, Jaramillo, Víctor, Megevand, Miguel, Núñez, Darío, Sarbach, Olivier
A new class of complex scalar field objects, which generalize the well known boson stars, was recently found as solutions to the Einstein-Klein-Gordon system. The generalization consists in incorporating some of the effects of angular momentum, while
Externí odkaz:
http://arxiv.org/abs/2112.04529
Autor:
Alcubierre, Miguel, Barranco, Juan, Bernal, Argelia, Degollado, Juan Carlos, Diez-Tejedor, Alberto, Megevand, Miguel, Núñez, Darío, Sarbach, Olivier
In previous work we constructed new boson star solutions consisting of a family of massive complex scalar fields minimally coupled to gravity in which the individual fields have angular momentum, yet the configuration as a whole is static and spheric
Externí odkaz:
http://arxiv.org/abs/2103.15012
The present paper is a follow-up of our previous paper that derives a slightly simplified model equation for the Klein-Gordon equation, describing the propagation of a scalar field of mass $\mu$ in the background of a rotating black hole and, among o
Externí odkaz:
http://arxiv.org/abs/2102.00972
Autor:
Alcubierre, Miguel, Barranco, Juan, Bernal, Argelia, Degollado, Juan Carlos, Diez-Tejedor, Alberto, Megevand, Miguel, Núñez, Darío, Sarbach, Olivier
In previous work, we have found new static, spherically symmetric boson star solutions which generalize the standard boson stars by allowing a particular superposition of scalar fields in which each of the fields is characterized by a fixed value of
Externí odkaz:
http://arxiv.org/abs/1906.08959
Autor:
Alcubierre, Miguel, Barranco, Juan, Bernal, Argelia, Degollado, Juan Carlos, Diez-Tejedor, Alberto, Megevand, Miguel, Nunez, Dario, Sarbach, Olivier
We present new, fully nonlinear numerical solutions to the static, spherically symmetric Einstein-Klein-Gordon system for a collection of an arbitrary odd number $N$ of complex scalar fields with an internal $U(N)$ symmetry and no self-interactions.
Externí odkaz:
http://arxiv.org/abs/1805.11488
Autor:
Barranco, Juan, Bernal, Argelia, Degollado, Juan Carlos, Diez-Tejedor, Alberto, Megevand, Miguel, Nunez, Dario, Sarbach, Olivier
Publikováno v:
Phys. Rev. D 96, 024049 (2017)
It has long been known that no static, spherically symmetric, asymptotically flat Klein-Gordon scalar field configuration surrounding a nonrotating black hole can exist in general relativity. In a series of previous papers we proved that, at the effe
Externí odkaz:
http://arxiv.org/abs/1704.03450
Publikováno v:
Class. Quantum Grav. 34 094004 (2017)
Due to the numerical complexities of studying evolution in an anisotropic quantum spacetime, in comparison to the isotropic models, the physics of loop quantized anisotropic models has remained largely unexplored. In particular, robustness of bounce
Externí odkaz:
http://arxiv.org/abs/1701.05824
Autor:
Megevand, Miguel
Dynamical systems involving black holes are one of the most promising sources of detectable gravitational waves. Additionally, one expects strong electromagnetic signals whenever matter sources are present. In this dissertation, we study different as
Externí odkaz:
http://etd.lsu.edu/docs/available/etd-11032009-142431/