Tuesday, February 26, 2013

1302.6136 (Luca Barbiero et al.)

Nonlocal Long Range Orders in 1D Fermionic Systems    [PDF]

Luca Barbiero, Arianna Montorsi, Marco Roncaglia
We prove on a prototype Hamiltonian that hidden long range order is always present in the gapped phases of interacting fermionic systems on one dimensional lattices. It is captured by correlation functions of appropriate nonlocal charge and/or spin operators, which remain asymptotically finite. The corresponding microscopic orders are classified. The results are confirmed by DMRG numerical simulation of the phase diagram of the extended Hubbard model, and of a Haldane insulator phase.
View original: http://arxiv.org/abs/1302.6136

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