Hawking radiation, effective actions and covariant boundary conditions
نویسندگان
چکیده
منابع مشابه
Hawking Radiation, Effective Actions and Covariant Boundary Conditions
Introduction: Hawking radiation arises upon the quantisation of matter in a background spacetime with an event horizon. It therefore plays an important role in black hole physics. Apart from Hawking’s [4] original derivation, there are other approaches [5, 6], although none is completely clinching or conclusive. This has led researchers to consider alternative derivations providing new insights...
متن کاملHawking Radiation, Covariant Boundary Conditions and Vacuum States
The basic characteristics of the covariant current < Jμ > and the covariant energymomentum tensor < Tμν > in Unruh, Hartle-Hawking and Boulware states are obtained from a chiral effective action. These results are used to justify the covariant boundary condition used in recent approaches [2, 4, 5, 6] of computing the Hawking flux from chiral gauge and gravitational anomalies. We also discuss a ...
متن کاملAnomaly induced effective actions and Hawking radiation
In the mid-seventies Hawking [1] showed that black holes are quantum mechanically unstable: they decay by the emission of thermal radiation at a temperature inversely proportional to their mass, i.e. TH = (8πM)−1 in units where h̄ = c = G = kB = 1. This is one of the most astonishing discoveries of theoretical physics in the second half of the century. Nowadays black hole radiation and its therm...
متن کاملCovariant Anomalies, Horizons and Hawking Radiation
Hawking radiation is obtained from anomalies resulting from a breaking of diffeomorphism symmetry near the event horizon of a black hole. Such anomalies, manifested as a nonconservation of the energy momentum tensor, occur in two different forms – covariant and consistent. The crucial role of covariant anomalies near the horizon is revealed since this is the only input required to obtain the Ha...
متن کاملHawking radiation in Reissner-Nordström blackhole with a global monopole via Covariant anomalies and Effective action
We adopt the covariant anomaly cancellation method as well as the effective action approach to obtain the Hawking radiation from the Reissner-Nordström blackhole with a global monopole falling in the class of the most general spherically symmetric charged blackhole ( √−g 6= 1), using only covariant boundary condition at the event horizon.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2008
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2007.11.068