Artículos de revistas
Tachyon condensation in superstring field theory
Fecha
2000-10-30Registro en:
Nuclear Physics B, v. 587, n. 1-3, p. 147-178, 2000.
0550-3213
10.1016/S0550-3213(00)00501-0
WOS:000089783900006
2-s2.0-0000487877
Autor
Universidade Estadual Paulista (Unesp)
Chhatnag Road, Jhoosi, 211019
Massachusetts Institute of Technology (MIT)
Institución
Resumen
It has been conjectured that at the stationary point of the tachyon potential for the D-brane-anti-D-brane pair or for the non-BPS D-brane of superstring theories, the negative energy density cancels the brane tensions. We study this conjecture using a Wess-Zumino-Witten-like open superstring field theory free of contact term divergences and recently shown to give 60% of the vacuum energy by condensation of the tachyon field alone. While the action is non-polynomial, the multiscalar tachyon potential to any fixed level involves only a finite number of interactions. We compute this potential to level three, obtaining 85% of the expected vacuum energy, a result consistent with convergence that can also be viewed as a successful test of the string field theory. The resulting effective tachyon potential is bounded below and has two degenerate global minima. We calculate the energy density of the kink solution interpolating between these minima finding good agreement with the tension of the D-brane of one lower dimension. © 2000 Elsevier Science B.V.