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Our approach is an adaptation of that used in Ref. 24 to analyze gauge theories at large Higgs coupling.
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ij living on the comer and bond-centered sites of a cubic lattice, with the classical energy It is remarkable that this simple XY-like model has two magnetically disordered phases, one of which is topologically ordered. In the main text, we have chosen to simulate a somewhat more complicated looking action (10) so as not to divert the reader's attention from the quantum Hamiltonian equation (1).
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