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The spatial 't Hooft loop, which is a disorder parameter dual to the temporal Wilson loop, is calculated using the nonperturbative Yang-Mills vacuum wave functional determined previously by a variational solution of the Yang-Mills Schr\"odinger equation in Coulomb gauge. It is shown that this wave functional yields indeed a perimeter law for large spatial 't Hooft loops signaling confinement.
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Reinhardt et al. (2007) studied this question.
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