Noncommutative Tachyons

Abstract

When unstable Dp-branes in type II string theory are placed in a B-field, the resulting tachyonic world-volume theory becomes noncommutative. We argue that for large noncommutativity parameter, condensation of the tachyon as a noncommutative soliton leads to new decay modes of the Dp-brane into (p-2)-brane configurations, which we interpret as suitably smeared BPS D(p-1)-branes. Some of these configurations are metastable. We discuss various generalizations of this decay process.

15 pages, harvmac (b)

References in corpus (3)

• T-duality and Actions for Non-BPS D-branes
• On Brane-Antibrane Forces
• Noncommutative Solitons

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