Extracting black-hole rotational energy: The generalized Penrose process

@article{43590,
   author = {Abramowicz, Marek},
   article_location = {US - Spojené státy americké},
   article_number = {2},
   doi = {http://dx.doi.org/10.1103/PhysRevD.89.024041},
   keywords = {Penrose process},
   language = {eng},
   issn = {1550-7998},
   journal = {Physical Review D},
   title = {Extracting black-hole rotational energy: The generalized Penrose process},
   url = {https://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.024041},
   volume = {89},
   year = {2014}
}

TY  - JOUR
ID  - 43590
AU  - Abramowicz, Marek
PY  - 2014
TI  - Extracting black-hole rotational energy: The generalized Penrose process
JF  - Physical Review D
VL  - 89
IS  - 2
SP  - "024041-1"-"024041-24"
EP  - "024041-1"-"024041-24"
SN  - 15507998
KW  - Penrose process
UR  - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.024041
N2  - In the case involving particles, the necessary and sufficient condition for the Penrose process to extract energy from a rotating black hole is absorption of particles with negative energies and angular momenta. No torque at the black-hole horizon occurs. In this article we consider the case of arbitrary fields or matter described by an unspecified, general energy-momentum tensor T_{mu nu} and show that the necessary and sufficient condition for extraction of a black hole?s rotational energy is analogous to that in the mechanical Penrose process: absorption of negative energy and negative angular momentum. We also show that a necessary condition for the Penrose process to occur is for the Noether current (the conserved energy-momentum density vector)to be spacelike or past directed (timelike or null) on some part of the horizon. In the particle case, our general criterion for the occurrence of a Penrose process reproduces the standard result. In the case of relativistic jet-producin
ER  - 

ABRAMOWICZ, Marek. Extracting black-hole rotational energy: The generalized Penrose process. \textit{Physical Review D}. US - Spojené státy americké, 2014, vol.~89, No~2, p.~''024041-1''-''024041-24'', 24 pp. ISSN~1550-7998. Available from: https://dx.doi.org/10.1103/PhysRevD.89.024041.