Quantum frictionless trajectories versus geodesics

DOI: 
10.1103/PhysRevD.92.084031
Publication date: 
15/10/2015
Main author: 
Barbado L.C.
IAA authors: 
Barbado L.C.;Barceló C.
Authors: 
Barbado L.C., Barceló C., Garay L.J.
Journal: 
Physical Review D - Particles, Fields, Gravitation and Cosmology
Publication type: 
Article
Volume: 
92
Pages: 
Number: 
084031
Abstract: 
Moving particles outside a star will generally experience quantum friction caused by the Unruh radiation reaction. There exist however radial trajectories that lack this effect (in the outgoing radiation sector, and ignoring backscattering). Along these trajectories, observers perceive just stellar emission, without further contribution from the Unruh effect. They turn out to have the property that the variations of the Doppler and the gravitational shifts compensate each other. They are not geodesics, and their proper acceleration obeys an inverse square law, which means that it could in principle be generated by outgoing stellar radiation. In the case of a black hole emitting Hawking radiation, this may lead to a buoyancy scenario. The ingoing radiation sector has little effect and seems to slow down the fall even further. © 2015 American Physical Society.
Database: 
WOK
SCOPUS
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2015PhRvD..92h4031B/abstract
ADS Bibcode: 
2015PhRvD..92h4031B
Keywords: