A Caltech Library Service

D-Brane Actions and N=2 Supergravity Solutions


Ciocarlie, Calin A. (2004) D-Brane Actions and N=2 Supergravity Solutions. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/WSR1-2S04.


Among the most remarkable recent developments in string theory are the AdS/CFT duality, as proposed by Maldacena, and the emergence of noncommutative geometry. It has been known for some time that for a system of almost coincident D-branes the transverse displacements that represent the collective coordinates of the system become matrix-valued transforming in the adjoint representation of U(N). From a geometrical point of view this is rather surprising but, as we will see in Chapter 2, it is closely related to the noncommutative descriptions of D-branes.

A consequence of the collective coordinates becoming matrix-valued is the appearance of a dielectric effect in which D-branes can become polarized into higher-dimensional fuzzy D-branes. This last aspect has inspired Polchinski and Strassler to find a nonsingular string dual of a confining four-dimensional gauge theory. The nonsingular geometry is sourced by an extended brane arising from Myers' dielectric effect. Following the spirit of the Polchinski-Strassler paper, we find N = 2 supergravity solutions with polarized branes and a field-theory dual. In our case we are able to present exact supergravity solutions by using M-theory reductions to type IIA supergravity.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:string theory
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Schwarz, John H.
Group:Caltech Theory
Thesis Committee:
  • Schwarz, John H. (chair)
  • Kapustin, Anton N.
  • Wise, Mark B.
  • Frautschi, Steven C.
Defense Date:20 May 2004
Record Number:CaltechETD:etd-06022004-125935
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2382
Deposited By: Imported from ETD-db
Deposited On:02 Jun 2004
Last Modified:06 Jan 2021 00:41

Thesis Files

PDF - Final Version
See Usage Policy.


Repository Staff Only: item control page