Rolling Tachyon

@inproceedings{Sen2002RollingT,
  title={Rolling Tachyon},
  author={Ashoke Sen},
  year={2002}
}
We discuss construction of classical time dependent solutions in open string (field) theory, describing the motion of the tachyon on unstable D-branes. Despite the fact that the string field theory action contains infinite number of time derivatives, and hence it is not a priori clear how to set up the initial value problem, the theory contains a family of time dependent solutions characterized by the initial position and velocity of the tachyon field. We write down the world-sheet action of… 

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