14 research outputs found
Geometric Finiteness, Holography and Quasinormal Modes for the Warped AdS_3 Black Hole
We show that there exists a precise kinematical notion of holography for the
Euclidean warped black hole. This follows from the fact that the
Euclidean warped black hole spacetime is a geometrically finite
hyperbolic manifold. For such manifolds a theorem of Sullivan provides a
one-to-one correspondence between the hyperbolic structure in the bulk and the
conformal structure of its boundary. Using this theorem we obtain the
holographic quasinormal modes for the warped black hole.Comment: Latex file, 7 pages. Journal versio
Non linear integral equation and excited--states scaling functions in the sine-Gordon model
The NLIE (the non-linear integral equation equivalent to the Bethe Ansatz
equations for finite size) is generalized to excited states, that is states
with holes and complex roots over the antiferromagnetic ground state. We
consider the sine-Gordon/massive Thirring model (sG/mT) in a periodic box of
length using the light-cone approach, in which the sG/mT model is obtained
as the continuum limit of an inhomogeneous six vertex model. This NLIE is an
useful starting point to compute the spectrum of excited states both
analytically in the large (perturbative) and small (conformal) regimes
as well as numerically.Comment: LaTeX file, 40 pages, 4 figures in a tar.Z file (3 figures added and
few misprints corrected w.r.t. previous version
Basal-Plane Magnetic Anisotropies of High-kappa d-Wave Superconductors in a Mixed State: A Quasiclassical Approach
We study the basal-plane anisotropies of reversible magnetization and torque
in a mixed state of layered d-wave superconductors based on the quasiclassical
version of the BCS-Gor'kov theory. Both the longitudinal magnetization ()
and torque () show fourfold oscillations as a function of the field angle
. The relationship between the node position and the oscillatory patterns
shown by and is clarified. It is also shown that the sign of the
-oscillation does not change between and , while
the sign of the -oscillation changes. The newly obtained result for
indicates that the torque experiment can allow us to detect the in-plane
anisotropies of even in a material with strong fluctuations such as
cuprate or organic superconductors, where the itself cannot be
determined experimentally.Comment: 10 pages, 9 figure