Moduli Space of Unstable D-branes on a Circle of Critical Radius | Zendy

Ashoke Sen | Zendy

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Moduli Space of Unstable D-branes on a Circle of Critical Radius

Author(s) -

Ashoke Sen

Publication year - 2004

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2004/03/070

Subject(s) - tachyon , moduli space , physics , brane , moduli , radius , mathematical physics , string theory , brane cosmology , tachyon condensation , conformal field theory , field (mathematics) , torus , space (punctuation) , geometry , string field theory , conformal map , mathematics , quantum mechanics , pure mathematics , linguistics , philosophy , computer security , computer science

We study the moduli space of the boundary conformal field theories describingan unstable D-brane of type II string theory compactified on a circle ofcritical radius. This moduli space has two branches, -- a three dimensionalbranch S^3/Z_2 and a two dimensional branch described by a square torus T^2.These two branches are joined along a circle. We compare this with the modulispace of classical solutions of tachyon effective field theory compactified ona circle of critical radius. This moduli space has a very similar structure tothat of the boundary conformal field theory with the only difference that theS^3 of the S^3/Z_2 component becomes a deformed S^3. This provides one moreindication that the tachyon effective field theory captures qualitatively thedynamics of the tachyon on an unstable D-brane.Comment: LaTeX file, 24 pages, 2 figures; v2: reference to earlier work adde

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