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Time Evolution in Open String Theory

Ashoke Sen1,2

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We discuss a general iterative procedure for constructing time dependent solutions in open string theory describing rolling of a generic tachyon field away from its maximum. These solutions are characterized by two parameters labelling the initial position and velocity of the tachyon field, but one of these parameters can be removed by using time translation symmetry. The Wick rotated version of the resulting one parameter family of inequivalent solutions describes a one parameter family of boundary conformal field theories, each member of which is related to the boundary conformal field theory describing the original D-brane system by a nearly marginal deformation. We apply this technique to construct a time dependent solution on a D-brane in bosonic string theory which can be interpreted as the creation of a lower dimensional brane during the decay of an unstable D-brane.


Keywords

String Field Theory

Tachyon Condensation

D-branes

 

E-print Number: hep-th/0207105

Cited: by |

Refers: to

PACS

11.25.Hf Conformal field theory, algebraic structures

11.25.Sq Nonperturbative techniques; string field theory

11.25.Uv D branes

Subjects

Particle physics and field theory

Dates

Issue 10 (October 2002)

Received 29 September 2002, accepted for publication 1 October 2002

Published 23 October 2002



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