Use this URL to cite or link to this record in EThOS:
Title: Branes and black holes in string theory
Author: da Costa, M. S.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 1999
Availability of Full Text:
Full text unavailable from EThOS.
Please contact the current institution’s library for further details.
The goal of this thesis is to address several issues in gravitational physics, in particular black hole physics, within a quantum mechanical framework. Of course this requires the existence of such a quantum mechanical theory of gravity. Superstring theory is a consistent perturbative theory of gravity. However, many aspects of the theory turn out to be non-perturbative and in this sense the theory is still under construction. The theory of strings contains a large variety of p-dimensional spatially extended objects, now called p-branes. These p-branes are dynamical objects embedded in space-time: they interact between each other, intersect each other and bound themselves together. In this thesis I shall study some of these p-brane configurations. I shall start by using supergravity which is a large distance (low energy) approximation to string theory, to construct many new p-brane configurations. The emphasis will be on the technics to construct the supergravity solutions describing these configurations and on the symmetries of the underlying theory that render their existence. I shall not attempt to give a complete classification of the p-brane configurations folklore nor shall I address issues related to the global structure of the corresponding gravitational geometry. In turn, the focus will be on the microscopic and quantum mechanical description of some of these p-brane configurations, namely the D-brane bound states. In particular, I shall study in detail a D-5 brane configuration with a constant magnetic field on its worldvolume. The gravitational counterpart is a five-dimensional black hole. The quantum mechanical description of this system will allow the calculation of the Bekenstein-Hawking entropy from counting microscopic states of the D-brane system. The scattering of a scalar particle off the black hole (and therefore Hawking radiation) are also studied. I end by making a proposal for an effective string description of black hole dynamics. In the process I shall use results in perturbative string theory, gauge theory and gravitational theory. In this sense, this thesis is rather interdisciplinary which is a remarkable characteristic acquired by superstring theory.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available