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SUPERGRAVITY, STRING THEORY AND BLACK HOLES
by
Nikolay P. Bobev
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(PHYSICS)
August 2010
Copyright 2010 Nikolay P. Bobev
Object Description
| Title | Supergravity, string theory and black holes |
| Author | Bobev, Nikolay Plamenov |
| Author email | bobev@usc.edu; nikolai.bobev@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Physics |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2010-04-30 |
| Date submitted | 2010 |
| Restricted until | Unrestricted |
| Date published | 2010-07-26 |
| Advisor (committee chair) | Warner, Nicholas |
| Advisor (committee member) |
Pilch, Krzysztof Bars, Itzhak Haas, Stephan Bonahon, Francis |
| Abstract | In this thesis we study a large class of three-charge solutions of supergravity in various dimensions and duality frames. The solutions have the same asymptotic structure, supersymmetry and conserved charges as black holes and black rings with macroscopic horizons and finite entropy. These supergravity solutions have neither horizons nor singularities and can be viewed as examples of the "geometric transition" mechanism of string theory.; We also study the gravitational analog of spectral flow in conformal field theory and use it as an efficient solution-generating technique in supergravity. This provides a useful relation between two-charge and three-charge supergravity solutions which we study in detail. By studying two-charge supertubes in the background of regular three-charge solutions with dipole charges we uncover a novel mechanism for entropy enhancement and discuss its implications for black-hole physics.; We generalize the well-known class of three-charge supersymmetric solutions in five dimensions, based on Gibbons-Hawking spaces, by studying supergravity solutions with less global symmetry. This is computationally challenging but we manage to present the first examples of such solutions and discuss their relation to black holes and black rings.; We also study non-supersymmetric asymptotically flat supergravity solutions with a four-dimensional Ricci-flat or Einstein-Maxwell base. These are solutions of string or M-theory compactified to five dimensions and provide some of the very few examples of regular non-supersymmetric gravity solutions. |
| Keyword | theoretical physics; string theory; black holes |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m3220 |
| Rights | Bobev, Nikolay Plamenov |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Bobev-3754 |
| Archival file | uscthesesreloadpub_Volume44/etd-Bobev-3754.pdf |
Description
| Title | Page 1 |
| Full text | SUPERGRAVITY, STRING THEORY AND BLACK HOLES by Nikolay P. Bobev A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (PHYSICS) August 2010 Copyright 2010 Nikolay P. Bobev |
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