TY - JOUR
T1 - Generalized Painlevé-Gullstrand metrics
AU - Lin, Chun Yu
AU - Soo, Chopin
N1 - Funding Information:
This work has been supported in part by funds from the National Science Council of Taiwan under Grant No. NSC95-2112-M-006-011-MY3, and by the National Center for Theoretical Sciences, Taiwan.
PY - 2009/2/2
Y1 - 2009/2/2
N2 - An obstruction to the implementation of spatially flat Painlevé-Gullstrand (PG) slicings is demonstrated, and explicitly discussed for Reissner-Nordström and Schwarzschild-anti-deSitter spacetimes. Generalizations of PG slicings which are not spatially flat but which remain regular at the horizons are introduced. These metrics can be obtained from standard spherically symmetric metrics by physical Lorentz boosts. With these generalized PG metrics, problematic contributions to the imaginary part of the action in the Parikh-Wilczek derivation of Hawking radiation due to the obstruction can be avoided.
AB - An obstruction to the implementation of spatially flat Painlevé-Gullstrand (PG) slicings is demonstrated, and explicitly discussed for Reissner-Nordström and Schwarzschild-anti-deSitter spacetimes. Generalizations of PG slicings which are not spatially flat but which remain regular at the horizons are introduced. These metrics can be obtained from standard spherically symmetric metrics by physical Lorentz boosts. With these generalized PG metrics, problematic contributions to the imaginary part of the action in the Parikh-Wilczek derivation of Hawking radiation due to the obstruction can be avoided.
UR - https://www.scopus.com/pages/publications/58249143750
UR - https://www.scopus.com/pages/publications/58249143750#tab=citedBy
U2 - 10.1016/j.physletb.2008.12.051
DO - 10.1016/j.physletb.2008.12.051
M3 - Article
AN - SCOPUS:58249143750
SN - 0370-2693
VL - 671
SP - 493
EP - 495
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 4-5
ER -