Space group symmetries and low lying excitations of many-body systems at integer fillings

2012/12/12 by Rahul Roy, Roy, Rahul · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Cold Atom Physics and Bose-Einstein Condensates #Spectroscopy and Quantum Chemical Studies #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.1212.2944

arxiv created 2012/12/12 · arxiv updated 2012/12/13

Abstract

We show that many-body systems with conserved particle number which have the symmetries corresponding to a nonsymmorphic space group have low lying excitations for certain integer values of the particle number per unit cell. These results may be interpreted as a generalization of some band touching theorems to interacting systems.

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