Remark on marginally stable bound states in type II string theory

Ashoke Sen

doi:10.1103/physrevd.54.2964

BPS-saturated bound states of tiltedp-branes in type II string theory

Physical Review D ◽

10.1103/physrevd.56.1188 ◽

1997 ◽

Vol 56 (2) ◽

pp. 1188-1193 ◽

Cited By ~ 20

Author(s):

Klaus Behrndt ◽

Mirjam Cvetič

Keyword(s):

String Theory ◽

Bound States ◽

Type Ii

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SO(3)×U(1) Isometric Instantons with Non-Abelian Hair in Four-Dimensional String Theory

Modern Physics Letters A ◽

10.1142/s0217732397001886 ◽

1997 ◽

Vol 12 (25) ◽

pp. 1847-1858

Author(s):

Adrián R. Lugo

Keyword(s):

String Theory ◽

Type Ii ◽

Dimensional Solution ◽

Coset Model

We compute the exact effective string vacuum backgrounds of the level k=81/19 SU(2,1)/U(1) coset model. A compact SU(2) isometry present in this seven-dimensional solution allows one to interpret it after compactification as a four-dimensional non-Abelian SU(2) charged instanton with a singular submanifold and an SO(3) × U(1) isometry. The semiclassical backgrounds, solutions of the type II strings, present similar characteristics

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Spin(p + 1, p + 1) COVARIANT Dp-BRANE BOUND STATES

International Journal of Modern Physics A ◽

10.1142/s0217751x01004323 ◽

2001 ◽

Vol 16 (17) ◽

pp. 3025-3040 ◽

Cited By ~ 8

Author(s):

P. SUNDELL

Keyword(s):

Field Theory ◽

Ground State ◽

Bound States ◽

Type Ii ◽

Duality Group ◽

Zero Force ◽

Force Condition ◽

The Stability

We construct Spin (p + 1, p + 1) covariant D p-brane bound states by using the fact that the potentials in the RR sector of toroidically compactified type II supergravity transform as a chiral spinor of the T duality group. As an application, we show the invariance of the zero-force condition for a probe D-brane under noncommutative deformations of the background, which gives a holographic proof of the stability of the corresponding field theory ground state under noncommutative deformations. We also identify the Spin (p + 1, p + 1) transformation laws by examining the covariance of the D-brane Lagrangians.

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EXTREME DYONIC BLACK HOLES IN STRING THEORY

Modern Physics Letters A ◽

10.1142/s0217732396000709 ◽

1996 ◽

Vol 11 (09) ◽

pp. 689-713 ◽

Cited By ~ 152

Author(s):

A.A. TSEYTLIN

Keyword(s):

Black Holes ◽

String Theory ◽

Short Distance ◽

Black Hole Entropy ◽

Universal Relation ◽

Type Ii ◽

Statistical Entropy ◽

Five Dimensions ◽

Compact Dimension ◽

Lower Dimensional

Supersymmetric extreme dyonic black holes of toroidally compactified heterotic or type-II string theory can be viewed as lower-dimensional images of solitonic strings wound around a compact dimension. We consider conformal sigma models which describe string configurations corresponding to various extreme dyonic black holes in four and five dimensions. These conformal models have regular short-distance region equivalent to a WZW theory with level proportional to magnetic charges. Arguments are presented suggesting a universal relation between the black hole entropy (area) and the statistical entropy of BPS-saturated oscillation states of solitonic string.

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T-Duality in Type II String Theory via Noncommutative Geometry and Beyond

Progress of Theoretical Physics Supplement ◽

10.1143/ptps.171.237 ◽

2007 ◽

Vol 171 ◽

pp. 237-257

Author(s):

Varghese Mathai

Keyword(s):

String Theory ◽

Noncommutative Geometry ◽

Type Ii

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FIVEBRANE STRUCTURES

Reviews in Mathematical Physics ◽

10.1142/s0129055x09003840 ◽

2009 ◽

Vol 21 (10) ◽

pp. 1197-1240 ◽

Cited By ~ 18

Author(s):

HISHAM SATI ◽

URS SCHREIBER ◽

JIM STASHEFF

Keyword(s):

String Theory ◽

Heterotic String ◽

Target Space ◽

Type Ii ◽

Anomaly Cancellation ◽

Heterotic String Theory ◽

Dual Version ◽

String Structure ◽

Topological Obstructions ◽

The One

We study the cohomological physics of fivebranes in type II and heterotic string theory. We give an interpretation of the one-loop term in type IIA, which involves the first and second Pontrjagin classes of spacetime, in terms of obstructions to having bundles with certain structure groups. Using a generalization of the Green–Schwarz anomaly cancellation in heterotic string theory which demands the target space to have a String structure, we observe that the "magnetic dual" version of the anomaly cancellation condition can be read as a higher analog of String structure, which we call Fivebrane structure. This involves lifts of orthogonal and unitary structures through higher connected covers which are not just 3- but even 7-connected. We discuss the topological obstructions to the existence of Fivebrane structures. The dual version of the anomaly cancellation points to a relation of string and Fivebrane structures under electric-magnetic duality.

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