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Constraining the QCD phase diagram by tricritical lines at imaginary chemical potential.
MedLine Citation:
PMID:  21230895     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
We present unambiguous evidence, from lattice simulations of QCD with three degenerate quark species, for two tricritical points in the (T, m) phase diagram at fixed imaginary chemical potential μ/T = iπ/3 mod2π/3, one in the light and one in the heavy mass regime. These represent the boundaries of the chiral and deconfinement critical lines continued to imaginary μ, respectively. It is demonstrated that the shape of the deconfinement critical line for real chemical potentials is dictated by tricritical scaling and implies the weakening of the deconfinement transition with real chemical potential. The generalization to nondegenerate and light quark masses is discussed.
Authors:
Philippe de Forcrand; Owe Philipsen
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Publication Detail:
Type:  Journal Article     Date:  2010-10-04
Journal Detail:
Title:  Physical review letters     Volume:  105     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2011-01-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  152001     Citation Subset:  -    
Affiliation:
Institut für Theoretische Physik, ETH Zürich, CH-8093 Zürich, Switzerland. forcrand@phys.ethz.ch
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