Tachyon Condensation in Cubic Superstring Field Theory

The Hidden

Tachyon Condensation

in

Cubic Superstring Field Theory

https://arxiv.org/pdf/hep-th/0011117.pdf

Abstract

It has been conjectured that at the stationary point of the tachyon potential for the

non-BPS D-brane or brane-anti-D-brane pair, the negative energy density cancels the

brane tension. We study this conjecture using a cubic superstring field theory with insertion of a double-step inverse picture changing operator. We compute the tachyon potential

at levels (1

/

2

, 1) and (2

, 6). In the first case we obtain that the value of the potential

at the minimum is 97

.5% of the non BPS D-brane tension. Using a special gauge in the

second case we get 105

.8% of the tension.

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