On noncommutative dynamic spacetimes

Bowden, John (2014) On noncommutative dynamic spacetimes. Masters thesis, Memorial University of Newfoundland.

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    Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
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Abstract

Noncommutative gravity is a theory of quantum gravity that presupposes a fuzziness in spatial coordinates. Under the formalism of coherent states, mass is diffused per a gaussian distribution. In this work we begin with a review of existing noncommutative spacetime solutions. We then study the classical Vaidya spacetime with parameters for mass and charge, in the context of noncommutative gravity. The characteristic behaviour of this spacetime is discussed, with particular attention to the moment of formation of the apparent horizon. At this moment, the black hole is extremal, and we discuss the relationship between the mass and charge parameters, and the time and position of the apparent horizon. We follow with a calculation of the stress-energy tensor for a noncommutative Vaidya spacetime, and show violation of the energy conditions. Using a polytropic-like equation of state, we construct a new dynamic spacetime solution that satisfies the dominant energy condition, and encompasses several interpretations via parameter choice.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/6278
Item ID: 6278
Additional Information: Includes bibliographical references (pages 99-106).
Department(s): Science, Faculty of > Mathematics and Statistics
Date: May 2014
Date Type: Submission
Library of Congress Subject Heading: Quantum gravity--Mathematical models; Noncommutative differential geometry; Space and time--Mathematical models' Quantum field theory

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