Symmetry Restoration and Tachyon Condensation in Open String Theory

Details Symmetry Restoration and Tachyon Condensation in Open String Theory Symmetry Restoration and Tachyon Condensation in Open String Theory

2000-07-27

arxiv.org/abs/hep-th/0007226v1

JHEP 0104:018,2001

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, harvmac

Scientific paper

10.1088/1126-6708/2001/04/018

It has recently been argued that D-branes in bosonic string theory can be described as noncommutative solitons, outside whose core the tachyon is condensed to its ground state. We conjecture that, in addition, the local U(1) gauge symmetry is restored to a $U(\infty)$ symmetry in the vacuum outside this core. We present new solutions obeying this boundary condition. The tension of these solitons agrees exactly with the expected D-brane tension for arbitrary noncommutativity parameter $\t$, which effectively becomes a dynamical variable. The restored $U(\infty)$ eliminates unwanted extra modes which might otherwise appear outside the soliton core.

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