PEPS as unique ground states of local Hamiltonians

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dc.creatorPerez-Garcia, David
dc.creatorVerstraete, Frank
dc.creatorCirac, J. Ignacio
dc.creatorWolf, Michael M.
dc.date2007-07-16
dc.date.accessioned2026-07-07T09:46:45Z
dc.date.available2026-07-07T09:46:45Z
dc.descriptionIn this paper we consider projected entangled pair states (PEPS) on arbitrary lattices. We construct local parent Hamiltonians for each PEPS and isolate a condition under which the state is the unique ground state of the Hamiltonian. This condition, verified by generic PEPS and examples like the AKLT model, is an injective relation between the boundary and the bulk of any local region. While it implies the existence of an energy gap in the 1D case we will show that in certain cases (e.g., on a 2D hexagonal lattice) the parent Hamiltonian can be gapless with a critical ground state. To show this we invoke a mapping between classical and quantum models and prove that in these cases the injectivity relation between boundary and bulk solely depends on the lattice geometry.
dc.description8 pages
dc.identifierhttps://arxiv.org/abs/0707.2260
dc.identifierhttp://arxiv.org/abs/0707.2260
dc.identifierQuant. Inf. Comp. 8, 0650-0663 (2008).
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163638
dc.subjectQuantum Physics
dc.subjectStatistical Mechanics
dc.subjectMathematical Physics
dc.titlePEPS as unique ground states of local Hamiltonians
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