Acceleration of string loops in the Schwarzschild-de Sitter geometry

@article{45441,
   author = {Kološ, Martin and Stuchlík, Zdeněk},
   article_location = {US - Spojené státy americké},
   article_number = {6},
   doi = {http://dx.doi.org/10.1103/PhysRevD.85.065022},
   keywords = {Rotating black-hole; Cosmological constant; Cosmic strings; Dark energy},
   language = {eng},
   issn = {1550-7998},
   journal = {Physical Review D},
   title = {Acceleration of string loops in the Schwarzschild-de Sitter geometry},
   url = {https://arxiv.org/pdf/1206.5658v1.pdf},
   volume = {85},
   year = {2012}
}

TY  - JOUR
ID  - 45441
AU  - Kološ, Martin - Stuchlík, Zdeněk
PY  - 2012
TI  - Acceleration of string loops in the Schwarzschild-de Sitter geometry
JF  - Physical Review D
VL  - 85
IS  - 6
SN  - 15507998
KW  - Rotating black-hole
KW  - Cosmological constant
KW  - Cosmic strings
KW  - Dark energy
UR  - https://arxiv.org/pdf/1206.5658v1.pdf
N2  - We study acceleration of current-carrying string loops governed by the presence of an outer tension barrier and an inner angular momentum barrier in the field of Schwarzschild-de Sitter black holes. We restrict attention to the axisymmetric motion of string loops with energy high enough, when the string loop can overcome the gravitational attraction and escape to infinity. We demonstrate that string loops can be scattered near the black hole horizon, and the energy of string oscillations can be efficiently converted to the energy of their linear motion. Such a transmutation effect can potentially represent acceleration of jets in active galactic nuclei and microquasars. We give the conditions limiting energy available for conversion onto the jetlike motion. Surprisingly, we are able to show that string loops starting from rest can be accelerated up to velocities v=c even in the field of Schwarzschild black holes, if their angular momentum parameter is low enough. Such loops could serve
ER  - 

KOLOŠ, Martin and Zdeněk STUCHLÍK. Acceleration of string loops in the Schwarzschild-de Sitter geometry. \textit{Physical Review D}. US - Spojené státy americké, 2012, vol.~85, No~6, 13 pp. ISSN~1550-7998. Available from: https://dx.doi.org/10.1103/PhysRevD.85.065022.