In this Letter, we (1) construct a one-parameter family of lattice models of interacting spins; (2) obtain their exact ground states; (3) derive a statistical-mechanical analogy which relates their ground states to O(n) loop gases; (4) show that the models are critical for d
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| http://dx.doi.org/10.1103/PhysRevLett.94.147205 | DOI Listing |
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