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cond-mat.str-el2009★ 98 cited
Matrix Product States: Symmetries and Two-Body Hamiltonians
M. Sanz, M. M. Wolf, D. Perez-Garcia +1
We characterize the conditions under which a translationally invariant matrix product state (MPS) is invariant under local transformations. This allows us to relate the symmetry gr…
cond-mat.str-el2008★ 264 cited
String order and symmetries in quantum spin lattices
D. Perez-Garcia, M. M. Wolf, M. Sanz +2
We show that the existence of string order in a given quantum state is intimately related to the presence of a local symmetry by proving that both concepts are equivalent within th…