209 research outputs found
Null Branes in String Theory Backgrounds
We consider null bosonic p-branes moving in curved space-times and develop a
method for solving their equations of motion and constraints, which is suitable
for string theory backgrounds. As an application, we give an exact solution for
such background in ten dimensions.Comment: 11 pages, LaTeX. Final version, to appear in Phys. Rev.
M2-brane Solutions in AdS_7xS^4
We consider different M2-brane configurations in the M-theory AdS_7xS^4
background, with field theory dual A_{N-1}(2,0) SCFT. New membrane solutions
are found and compared with the recently obtained ones.Comment: LaTeX, 18 pages, no figures; V2: cosmetic changes to match the
version published in JHE
M2-brane Perspective on N=6 Super Chern-Simons Theory at Level k
Recently, O. Aharony, O. Bergman, D. L. Jafferis and J. Maldacena (ABJM)
proposed three-dimensional super Chern-Simons-matter theory, which at level k
is supposed to describe the low energy limit of N M2-branes. For large N and k,
but fixed 't Hooft coupling \lambda=N/k, it is dual to type IIA string theory
on AdS_4 x CP^3. For large N but finite k, it is dual to M theory on AdS_4 x
S^7/Z_k. In this paper, relying on the second duality, we find exact giant
magnon and single spike solutions of membrane configurations on AdS_4 x S^7/Z_k
by reducing the system to the Neumann-Rosochatius integrable model. We derive
the dispersion relations and their finite-size corrections with explicit
dependence on the level k.Comment: 19 pages, References adde
Tensionless branes and the null string critical dimension
BRST quantization is carried out for a model of p-branes with second class
constraints. After extension of the phase space the constraint algebra
coincides with the one of null string when p=1. It is shown that in this case
one can or can not obtain critical dimension for the null string, depending on
the choice of the operator ordering and corresponding vacuum states. When p>1,
operator orderings leading to critical dimension in the p=1 case are not
allowed. Admissable orderings give no restrictions on the dimension of the
embedding space-time. Finally, a generalization to supersymmetric null branes
is proposed.Comment: 12 pages, LaTeX 2.09. Title changed. Change in the transition from
second class constraints to first class ones. Comments, conclusions,
references, acknowledgments and report-no adde
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