141 research outputs found
Particles on AdS_{4/7} and Primary Operators on M_{2/5} Brane Worldvolumes
1 identify a correspondence between the various spherical harmonic modes of
massless 11 dimensional fields propagating on the in an AdS_{4/7}
\times S^{7\4} compactification of M theory, and the corresponding operators,
primary under the conformal group, on the world volume of branes.
This is achieved by matching representations of the superconformal algebra on
the two sides of the correspondence.Comment: 10 pages, harvmac, no figures : v2 changes in presentation, reference
added :v3 further changes in presentation, reference adde
Chern Simons Bosonization along RG Flows
It has previously been conjectured that the theory of free fundamental
scalars minimally coupled to a Chern Simons gauge field is dual to the theory
of critical fundamental fermions minimally coupled to a level rank dual Chern
Simons gauge field. In this paper we study RG flows away from these two fixed
points by turning on relevant operators. In the t' Hooft large N limit we
compute the thermal partition along each of these flows and find a map of
parameters under which the two partition functions agree exactly with each
other all the way from the UV to the IR. We conjecture that the bosonic and
fermionic RG flows are dual to each other under this map of parameters. Our
flows can be tuned to end at the gauged critical scalar theory and gauged free
fermionic theories respectively. Assuming the validity of our conjecture, this
tuned trajectory may be viewed as RG flow from the gauged theory of free bosons
to the gauged theory of free fermions.Comment: 21 pages, v2: new subsection 3.3 added, typos corrected, version
accepted in JHE
Comments on the IIA NS5-brane
We study coincident IIA NS5-branes at large using supergravity. We
show that the absorption cross section for gravitons in this background does
not vanish at zero string coupling for energies larger than
( is the string scale). Using a holographic description of the intrinsic
theory of the IIA NS5-branes, we find an expression for the two point function
of the stress energy tensor, and comment on its structure.Comment: 22 pages, harvmac, 2 figures. Interpretation of analytically
continued metric qualifie
Symmetry Restoration and Tachyon Condensation in Open String Theory
It has recently been argued that D-branes in bosonic string theory can be
described as noncommutative solitons, outside whose core the tachyon is
condensed to its ground state. We conjecture that, in addition, the local U(1)
gauge symmetry is restored to a symmetry in the vacuum outside this
core. We present new solutions obeying this boundary condition. The tension of
these solitons agrees exactly with the expected D-brane tension for arbitrary
noncommutativity parameter \t, which effectively becomes a dynamical
variable. The restored eliminates unwanted extra modes which might
otherwise appear outside the soliton core.Comment: 15 pages, harvma
Plasma-balls in large N gauge theories and localized black holes
We argue for the existence of plasma-balls - meta-stable, nearly homogeneous
lumps of gluon plasma at just above the deconfinement energy density - in a
class of large N confining gauge theories that undergo first order
deconfinement transitions. Plasma-balls decay over a time scale of order N^2 by
thermally radiating hadrons at the deconfinement temperature. In gauge theories
that have a dual description that is well approximated by a theory of gravity
in a warped geometry, we propose that plasma-balls map to a family of
classically stable finite energy black holes localized in the IR. We present a
conjecture for the qualitative nature of large mass black holes in such
backgrounds, and numerically construct these black holes in a particular class
of warped geometries. These black holes have novel properties; in particular
their temperature approaches a nonzero constant value at large mass. Black
holes dual to plasma-balls shrink as they decay by Hawking radiation; towards
the end of this process they resemble ten dimensional Schwarzschild black
holes, which we propose are dual to small plasma-balls. Our work may find
practical applications in the study of the physics of localized black holes
from a dual viewpoint.Comment: harvmac, 33 pages + 7 appendices + 14 figures; program code
downloadable from http://schwinger.harvard.edu/~wiseman/IRblackholes ; v2:
minor changes ; v3: refs added, minor change
Poles in the -Matrix of Relativistic Chern-Simons Matter theories from Quantum Mechanics
An all orders formula for the -matrix for 2 2 scattering in
large N Chern-Simons theory coupled to a fundamental scalar has recently been
conjectured. We find a scaling limit of the theory in which the pole in this
-matrix is near threshold. We argue that the theory must be well described
by non-relativistic quantum mechanics in this limit, and determine the relevant
Schroedinger equation. We demonstrate that the -matrix obtained from this
Schroedinger equation agrees perfectly with this scaling limit of the
relativistic -matrix; in particular the pole structures match exactly. We
view this matching as a nontrivial consistency check of the conjectured field
theory -matrix.Comment: 12 pages, minor correction
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