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Resonating valence bond states in the PEPS formalism


Schuch, Norbert y Poilblanc, Didier y Cirac, Juan I. y Pérez García, David (2012) Resonating valence bond states in the PEPS formalism. Physical review B, 86 (11). ISSN 1098-0121

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We study resonating valence bond (RVB) states in the projected entangled pair states (PEPS) formalism. Based on symmetries in the PEPS description, we establish relations between the toric code state, the orthogonal dimer state, and the SU(2) singlet RVB state on the kagome lattice: We prove the equivalence of toric code and dimer state, and devise an interpolation between the dimer state and the RVB state. This interpolation corresponds to a continuous path in Hamiltonian space, proving that the RVB state is the fourfold degenerate ground state of a local Hamiltonian on the (finite) kagome lattice. We investigate this interpolation using numerical PEPS methods, studying the decay of correlation functions, the change of overlap, and the entanglement spectrum, none of which exhibits signs of a phase transition.

Tipo de documento:Artículo
Palabras clave:Heisenberg-antiferromagnet; ground-states; quantum; phase
Materias:Ciencias > Matemáticas > Análisis matemático
Código ID:16764

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