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Spin models in complex magnetic fields: a hard sign problem
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...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2018
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| Acceso en línea: | https://dx.doi.org/10.1051/epjconf/201817507026 http://cds.cern.ch/record/2298634 |