arXiv subjects
Publications and source records attributed to V. Yasnov.
We check the large N transition proposed by Aganagic and Vafa and further studied by Diaconescu, Florea and Grassi using the large N limit of the corresponding Chern-Simons two matrix model. We find the spectral curve and calculate the genus zero free energy.
Using boundary string field theory we study the decay of unstable D-branes to lower dimensional D-branes via the tachyon condensation at one loop level. We analyze one loop divergences and use the Fischler-Susskind mechanism to cancel divergences arising at the boundary of moduli space. The tachyon action up to the second derivative is obtained and a logarithmic correction to the tachyon potential is written down explicitly. Multiple D-branes is also considered and the role of the boundary fermions is highlighted.
We calculate the background independent action for bosonic and supersymmetric open string field theory in a constant B-field. We also determine the tachyon effective action in the presence of constant B-field.