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Mind the gap
We discuss an optimisation criterion for the exact renormalisation group based on the inverse effective propagator, which displays a gap. We show that a simple extremisation of the gap stabilises the flow, leading to better convergence of approximate solutions towards the physical theory. This impro...
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| Lenguaje: | eng |
| Publicado: |
2001
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| Acceso en línea: | https://dx.doi.org/10.1142/S0217751X01004748 http://cds.cern.ch/record/497347 |