Heriot-Watt Mathematics Report Series
HWM02-29, 21 Aug 2002
New Methods to Measure Phase Transition Strength
W Janke, D A Johnston and R Kenna
Abstract
A recently developed technique to determine the order and strength of
phase
transitions by extracting the density of partition function zeroes (a
continuous function) from finite-size systems (a discrete data set) is
generalized to systems for which ( i\/}) some or all of the zeroes
occur in
degenerate sets and/or ( ii\/}) they are not confined to a singular
line in
the complex plane. The technique is demonstrated by application to the
case of free Wilson fermions.
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