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arXiv · 1302.6136

How Hidden Orders Generate Gaps in 1D Fermionic Systems

Luca Barbiero·Arianna Montorsi·Marco Roncaglia
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Abstract

We demonstrate 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.

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Luca Barbiero, Arianna Montorsi, Marco Roncaglia. 2013-02-25. How Hidden Orders Generate Gaps in 1D Fermionic Systems. https://doi.org/10.1103/physrevb.88.035109

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