Abstract
The coefficients of an expansion series in the hopping coefficients are determined. This allows to calculate\(\left\langle {\bar \Psi \Psi } \right\rangle\) analytically for any coupling constant and fermion mass in 1+1 dimensions.
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Wiltgen, M. \(\left\langle {\bar \Psi \Psi } \right\rangle\) in the Schwinger model with Wilson and naive fermions. Z. Phys. C - Particles and Fields 41, 95–98 (1988). https://doi.org/10.1007/BF01412584
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DOI: https://doi.org/10.1007/BF01412584