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A comparison is made between several models of lattice QED, in 2 + 1 dimensions, which have been shown to exhibit confinement for small couplings. We also compare two different approaches which have been employed to study this phenomenon: the variational and path-integral methods. The reasons for differences in the results are explored. The importance of compactness for low-coupling confinement is demonstrated.
Shahar Ben‐Menahem (Mon,) studied this question.
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