341 research outputs found
Hairy mass bound in the Einstein-Born-Infeld black hole
We study the Einstein-Born-Infeld (EBI) theory where the hairy black hole was
found as the EBI black hole by using Hod's idea. The hair extends beyond the
photon-sphere of the EBI black hole spacetimes. We show that the region beyond
the photon-sphere involves more than half of the total hair's mass, which
respects Hod's conjectured bound.Comment: 4 pages, 1 figure, version to appear in PR
Rank-3 finite temperature logarithmic conformal field theory
We construct a rank-3 finite temperature logarithmic conformal field theory
(LCFT) starting from a higher-derivative scalar field model in the BTZ black
hole background. Its zero temperature limit reduces to a rank-3 LCFT in the
AdS background. For a tricritical generalized massive gravity, we read off
the log-square quasinormal frequencies of graviton from the poles of the
retarded Green's function in the momentum space. After using the truncation
process, we find quasinormal frequencies from a unitary conformal field theory.
Finally, employing the retarded Green's functions on the boundary, we compute
the absorption cross sections of BTZ black hole which show feature of
higher-order differential equations for scalars.Comment: 19 pages, no figur
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