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

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

scholarly journals EXTREME DYONIC BLACK HOLES IN STRING THEORY

1996 ◽  
Vol 11 (09) ◽  
pp. 689-713 ◽  
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.

FIVEBRANE STRUCTURES

2009 ◽  
Vol 21 (10) ◽  
pp. 1197-1240 ◽  
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.

scholarly journals THE SIGMA MODEL FORMULATION OF TYPE II STRING THEORY IN THE AdS5 × S5 BACKGROUNDS WITH RAMOND–RAMOND FLUX

2003 ◽  
Vol 18 (10) ◽  
pp. 1749-1760
Author(s):  
SATCHIDANANDA NAIK
Keyword(s):  
String Theory ◽  
Sigma Model ◽  
Type Ii ◽  
Model Formulation ◽  
Model Action

A sigma model action is constructed for the type II string in the AdS 5 × S5 backgrounds with Ramond–Ramond flux.

scholarly journals New vacua for type II string theory

1996 ◽  
Vol 388 (4) ◽  
pp. 736-742 ◽  
Author(s):  
Joseph Polchinski ◽  
Andrew Strominger
Keyword(s):  
String Theory ◽  
Type Ii

scholarly journals Little string theory and heterotic/type II duality

2004 ◽  
Vol 679 (1-2) ◽  
pp. 3-65 ◽  
Author(s):  
Ofer Aharony ◽  
Bartomeu Fiol ◽  
David Kutasov ◽  
David A Sahakyan
Keyword(s):  
String Theory ◽  
Type Ii

scholarly journals Poisson equation for genus two string invariants: a conjecture

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Anirban Basu
Keyword(s):  
String Theory ◽  
Poisson Equation ◽  
Moduli Space ◽  
Asymptotic Expansions ◽  
Riemann Surfaces ◽  
Type Ii ◽  
Genus Two

Abstract We consider some string invariants at genus two that appear in the analysis of the D8ℛ4 and D6ℛ5 interactions in type II string theory. We conjecture a Poisson equation involving them and the Kawazumi-Zhang invariant based on their asymptotic expansions around the non-separating node in the moduli space of genus two Riemann surfaces.

Sign in / Sign up

Export Citation Format

Share Document