6 research outputs found
Renormalization Group Analysis of Tachyon Condensation
Renormalization group analysis of boundary conformal field theory on bosonic
D25-brane is used to study tachyon condensation. Placing the lump on a finite
circle and triggering only the first three tachyon modes, the theory flows to
nearby IR fixed point representing lumps that are extended object with definite
profile. The boundary entropy corresponding to the D24-brane tension is
calculated in the leading order in perturbative analysis which decreases under
RG flow and agrees with the expected result to an accuracy of 8%. Multicritical
behaviour of the IR theory suggests that the end point of the flow represents a
configuration of two D24-branes. Analogy with Kondo physics is discussed.Comment: 37 pages, LATEX, 1 figur
2D Black Hole and Holographic Renormalization Group
In hep-th/0311177, the Large renormalization group (RG) flows of a
modified matrix quantum mechanics on a circle, capable of capturing effects of
nonsingets, were shown to have fixed points with negative specific heat. The
corresponding rescaling equation of the compactified matter field with respect
to the RG scale, identified with the Liouville direction, is used to extract
the two dimensional Euclidean black hole metric at the new type of fixed
points. Interpreting the large RG flows as flow velocities in holographic
RG in two dimensions, the flow equation of the matter field around the black
hole fixed point is shown to be of the same form as the radial evolution
equation of the appropriate bulk scalar coupled to 2D black hole.Comment: 21 page