Fractional Branes in Non-compact Type IIA Orientifolds

Details Fractional Branes in Non-compact Type IIA Orientifolds Fractional Branes in Non-compact Type IIA Orientifolds

2006-02-14

arxiv.org/abs/hep-th/0602135v2

JHEP0611:008,2006

Physics

High Energy Physics

High Energy Physics - Theory

29 pages, Latex2e minor corrections. references updated. Version accepted in JHEP

Scientific paper

10.1088/1126-6708/2006/11/008

We study fractional D-branes in the Type-IIA theory on a non-compact orientifold of the orbifold C^3/Z_3 in the boundary state formalism. We find that the fractional D0-branes of the orbifold theory become unstable due to the presence of a tachyon, while there is a stable D-instanton whose tachyon gets projected out. We propose that the D-instanton is obtained after tachyon condensation. We evidence this by calculating the Whitehead group of the Abelian category of objects corresponding to the boundary states as being isomorphic to Z_2.

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