82 research outputs found
Absorption rate of the Kerr-de Sitter black hole and the Kerr-Newman-de Sitter black hole
By using an analytic solution of the Teukolsky equation in the Kerr-de Sitter
and Kerr-Newman-de Sitter geometries, an analytic expression of the absorption
rate formulae for these black holes is calculated.Comment: 11 pages, LaTeX. Several typos are correcte
Fluxes of Higher-spin Currents and Hawking Radiations from Charged Black Holes
This is an extended version of the previous paper (hep-th/0701272). Quantum
fields near horizons can be described in terms of an infinite set of
two-dimensional conformal fields. We first generalize the method of Christensen
and Fulling to charged black holes to derive fluxes of energy and charge. These
fluxes can be obtained by employing a conformal field theory technique. We then
apply this technique to obtain the fluxes of higher-spin currents and show that
the thermal distribution of Hawking radiation from a charged black hole can be
completely reproduced by investigating transformation properties of the
higher-spin currents under conformal and gauge transformations.Comment: 15 page
Higher-spin Currents and Thermal Flux from Hawking Radiation
Quantum fields near black hole horizons can be described in terms of an
infinite set of d=2 conformal fields. In this paper, by investigating
transformation properties of general higher-spin currents under a conformal
transformation, we reproduce the thermal distribution of Hawking radiation in
both cases of bosons and fermions. As a byproduct, we obtain a generalization
of the Schwarzian derivative for higher-spin currents.Comment: 4 pages, RevTex, accepted for publication in PR
Hawking Radiation from Charged Black Holes via Gauge and Gravitational Anomalies
Extending gr-qc/0502074, we show that in order to avoid a breakdown of
general covariance and gauge invariance at the quantum level the total flux of
charge and energy in each outgoing partial wave of a charged quantum field in a
Reissner-Nordstrom black hole background must be equal to that of a (1+1)
dimensional blackbody at the Hawking temperature with the appropriate chemical
potential.Comment: 4 pages, typos corrected, references added, version to appear in
Phys. Rev. Let
Explicit Formulae for Noncommutative Deformations of CP^N and CH^N
We give explicit expressions of a deformation quantization with separation of
variables for CP^N and CH^N. This quantization method is one of the ways to
perform a deformation quantization of Kahler manifolds, which is introduced by
Karabegov. Star products are obtained as explicit formulae in all order in the
noncommutative parameter. We also give the Fock representations of the
noncommutative CP^N and CH^N.Comment: 22 pages, some comments added, a reference added, to appear in J.
Math. Phy
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