Quantum symmetry of Hubbard model unraveled |
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| Affiliation: | 1. Max Planck Institute for Mathematics in the Sciences, Inselstrasse 22, 04103 Leipzig, Germany;2. Institut für Theoretische Physik, JW Goethe-Universität Frankfurt am Main, Max-von-Laue-Str. 1, D-60438 Frankfurt am Main, Germany;3. Dipartimento di Fisica “Ettore Pancini”, Università di Napoli “Federico II”, Complesso Universitario di Monte S. Angelo, via Cintia, I-80126 Napoli, Italy;4. INFN - Sezione di Napoli, Complesso Universitario di Monte S. Angelo, via Cintia, I-80126 Napoli, Italy;1. School of Physics, Nankai University, Tianjin 300071, People''s Republic of China;2. Interdisciplinary Center for Theoretical Study, University of Science and Technology of China, Hefei, Anhui 230026, People''s Republic of China |
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| Abstract: | Superconducting quantum symmetries in extended one-band one-dimensional Hubbard models are shown to originate from the classical (pseudo-) spin symmetry of a new class of models; the standard Hubbard model is a special case. The quantum symmetric models provide extra parameters but are restricted to one dimension. All models discussed are related by generalized Lang-Firsov transformations, some have symmetries away from half filling. |
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