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Winding theta and destructive interference of instantons

By Mendel Nguyen and others
While the \theta dependence of field theories is 2\pi periodic, the ground-state wavefunctions at \theta and \theta+2\pi often belong to different classes of symmetry-protected topological states. When this is the case, a continuous change of the \theta parameter can introduce an interface that supports a nontrivial field theory localized on... Show more
July 19, 2023
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Winding theta and destructive interference of instantons
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