Type
Text
Type
Dissertation
Advisor
Karsch, Frithjof | Jacobus Verbaarschot | Abhay Deshpande | Dominik Schneble | Robert Pisarski.
Date
2010-08-01
Keywords
Physics, Nuclear | Chiral Symmetry, Domain-Wall Fermions, Lattice QCD, QCD Phase Diagram, QCD Thermodynamics, Quark Number Susceptibilities
Department
Department of Physics
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/70884
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
In this work, we undertook an exploratory study of QCD thermodynamics with domain-wall fermions. This had been studied before but with much smaller lattices and a heavier pion. In this new study, we report on results obtained on much larger volumes and discuss what needs to be done to go even closer to the chiral limit. A second new aspect of our study was the introduction of a chemical potential for the first time in the domain-wall formalism. We measured the lowest-order quark number susceptibilities and found a well-defined, smooth transition in some of these susceptibilities.We also carried out several analytic calculations in the free-field case. One motivation was to understand how these fermions worked, especially with respect to thermodynamic simulations. However another motivation was to understand cutoff effects, which had not been studied before for these fermions.We found that these effects were significant for the free operator. We therefore implemented and tested an improved version of the operator with much smaller discretization errors. In this work, we also present some preliminary results of simulations that show that observables measured using this operator show much smaller cutoff errors.
Recommended Citation
Hegde, Prasad Satish, "Charge Fluctuations in Lattice QCD with Domain-Wall Fermions" (2010). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 93.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/93