4-string Junction and Its Network

Abstract

We study a BPS configuration in which four strings (of different type) meet at a point in $N=2,D=8$ supergravity, i.e., the low energy effective theory of $T^2$-compactified type II string theory. We demonstrate that the charge conservation of the four strings implies the vanishing of the net force (due to the tensions of various strings) at the junction and vice versa, using the tension formula for $SL(3,Z)$ strings obtained recently by the present authors. We then show that a general 4-string junction preserves 1/8 of the spacetime supersymmetries. Using 4-string junctions as building blocks, we construct a string network which also preserves 1/8 of the spacetime supersymmetries.

15 pages, Latex

References in corpus (8)

• The Self-Dual String Soliton
• String Network
• BPS Nature of 3-String Junctions
• Three-Pronged Strings and 1/4 BPS States in N=4 Super-Yang-Mills Theory
• Exceptional groups from open strings
• Worldsheet Dynamics of String Junctions
• Dynamics of BPS States in the Dirac-Born-Infeld Theory
• String Network and U-Duality

Cited by in corpus (3)

• Non-Planar String Networks on Tori
• String Multiplets from an Invariant 2-Brane
• Strings, Junctions and Stability