Coulomb correlations in equilibrium and nonequilibrium many-Fermion systems
Setlur, Girish
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https://hdl.handle.net/2142/31232
Description
Title
Coulomb correlations in equilibrium and nonequilibrium many-Fermion systems
Author(s)
Setlur, Girish
Issue Date
1999
Doctoral Committee Chair(s)
Chang, Yia-Chung
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Coulomb correlations
many-Fermion systems
condensed matter physics
many-body phenomena
nonequilibrium green functions
bosonization
Fermi liquid theory
Language
en
Abstract
The importance of the field of Condensed Matter Physics can hardly be
overstated. It deals with matter at everyday energies and with length and
times scales in which complex processes are able to occur. It is a field in which
much experimental and theoretical effort has been invested. New experimental
techniques continue to shift the boundaries of this diverse field. Yet the
theoretical tools that have been brought to bear on these problems have had
a distinctly stale flavor. Only recently have theorists woken up to the possibility
that modern techniques developed mainly by particle theorists could be
fruitfully applied to study these problems. The aim of this thesis is therefore
to study important physical phenomena in Condensed Matter Physics using
tools that are powerful enough to be able to probe new physics. In the first
part of this thesis I have shown how transient Many-Body phenomena may be
studied using nonequilibrium Green functions. In the second half I have developed
a new nonpertubative tool called bosonization and applied it to study
the all-important question at the frontier of Condensed Matter Theory namely
when does Fermi liquid theory break down and when it does what new physical
principles need to be invoked in order to understand physical phenomena
in this new and uncharted regime.
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