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Title: Excitations in holographic quantum liquids
Author: Davison, Richard A.
ISNI:       0000 0004 2744 4592
Awarding Body: University of Oxford
Current Institution: University of Oxford
Date of Award: 2012
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In this thesis we review the gauge/gravity duality and how it can be used to compute the thermodynamic properties and low-energy excitations of holographic quantum liquids - strongly-interacting field theories with a non-zero density of matter. We then study in detail the charge density excitations of two such liquids, the D3/D7 theory and the RN-AdS₄ theory, by computing the poles of their charge density Green's functions, and their charge density spectral functions. Although it is not a Landau Fermi liquid, the charge density excitations of the D3/D7 theory display many of the same properties as one, including a collisionless/hydrodynamic crossover as the temperature is increased. In contrast to this, the charge density (and energy density) excitations of the RN-AdS₄ theory do not share these properties but behave in a way that cannot be explained by Landau's theory of interacting fermionic quasiparticles. This is consistent with other results which indicate that this is not a Landau Fermi liquid.
Supervisor: Starinets, Andrei O. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Physics ; Theoretical physics ; Elementary particle theory ; Condensed matter theory ; String theory ; holography ; AdS/CFT correspondence ; gauge/gravity duality ; strongly-coupled gauge theories ; quantum field theory at finite temperature and density