Haegeman, Jutho; Pirvu, Bogdan; Weir, David J.; Cirac, J. Ignacio; Osborne, Tobias J.; Verschelde, Henri; Verstraete, Frank
(College Park, MD : American Physical Society, 2012)
A variational ansatz for momentum eigenstates of translation-invariant quantum spin chains is formulated. The matrix product state ansatz works directly in the thermodynamic limit and allows for an efficient implementation ...