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16 papers · 1 filter
Zero Modes for the Boundary Giant Magnons
Dongsu Bak
We study the fermion zero-mode dynamics for open strings ending on the giant graviton branes. For the open string ending on the Z=0 brane, the quantization of the fermion zero-mode…
The sound damping constant for generalized theories of gravity
Ram Brustein, A. J. M. Medved
The near-horizon metric for a black brane in Anti-de Sitter (AdS) space and the metric near the AdS boundary both exhibit hydrodynamic behavior. We demonstrate the equivalence of t…
The shear diffusion coefficient for generalized theories of gravity
Ram Brustein, A. J. M. Medved
Near the horizon of a black brane in Anti-de Sitter (AdS) space and near the AdS boundary, the long-wavelength fluctuations of the metric exhibit hydrodynamic behaviour. The gauge-…
Integrable Spin Chain in Superconformal Chern-Simons Theory
Dongsu Bak, Soo-Jong Rey
N = 6 superconformal Chern-Simons theory was proposed as gauge theory dual to Type IIA string theory on AdS4*CP3. We study integrability of the theory from conformal dimension spec…
A Fast Way to Compute Functional Determinants of Radially Symmetric Partial Differential Operators in General Dimensions
Jin Hur, Hyunsoo Min
Recently the partial wave cutoff method was developed as a new calculational scheme for a functional determinant of quantum field theory in radial backgrounds. For the contribution…
A Comment or two on Holographic Dark Energy
A. J. M. Medved
It has, quite recently, become fashionable to study a certain class of holographic-inspired models for the dark energy. These investigations have, indeed, managed to make some sign…