TY - JOUR
T1 - Why (staggered fermions)1/4 fail at finite density
AU - Svetitsky, Benjamin
AU - Shamir, Yigal
AU - Golterman, Maarten
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
PY - 2006
Y1 - 2006
N2 - Because the staggered fermion determinant is complex at nonzero μ, taking its fourth root leads to phase ambiguities. These unphysical effects cause the measure to become discontinuous; the problem becomes acute when Re μ ≳ mπ/2 (when T > 0 this rough bound probably moves towards larger μ). We show how to overcome the problem, but only very close to the continuum limit. This regime may be beyond reach with current resources.
AB - Because the staggered fermion determinant is complex at nonzero μ, taking its fourth root leads to phase ambiguities. These unphysical effects cause the measure to become discontinuous; the problem becomes acute when Re μ ≳ mπ/2 (when T > 0 this rough bound probably moves towards larger μ). We show how to overcome the problem, but only very close to the continuum limit. This regime may be beyond reach with current resources.
UR - http://www.scopus.com/inward/record.url?scp=85055704076&partnerID=8YFLogxK
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AN - SCOPUS:85055704076
VL - 32
JO - Proceedings of Science
JF - Proceedings of Science
SN - 1824-8039
Y2 - 23 July 2006 through 28 July 2006
ER -