TY  -  
T1  - Spin models in complex magnetic fields : A hard sign problem 
SN  -  /  
UR  - http://hdl.handle.net/10138/299851 
T3  - EPJ Web of Conferences 
A1  - Rindlisbacher, T.; De Forcrand, P. 
A2  - Gamiz Sanchez E., Pena Ruano C.; Fritzsch P., Della Morte M.; Della Morte, M.; Fritzsch, P.; Gámiz Sánchez , E.; Pena Ruan, C. 
PB  - EDP sciences 
Y1  - 2018 
LA  - eng 
AB  - Coupling spin models to complex external fields can give rise to interesting phenomena like zeroes of the partition function (Lee-Yang zeroes, edge singularities) or oscillating propagators. Unfortunately, it usually also leads to a severe sign problem that can be overcome only in special cases; if the partition function has zeroes, the sign problem is even representation-independent at these points. In this study, we couple the N-state Potts model in different ways to a complex external magneti... 
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KW  - 114 Physical sciences; 115 Astronomy, Space science 
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