Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5496236 | Physics Letters A | 2017 | 5 Pages |
Abstract
The experimental advances in cold fermion gases motivates the investigation of a one-dimensional (1D) correlated electronic system by incorporating a four-body coupling. Using the low-energy field theory scheme and focusing on the weak-coupling regime, we extend the 1D Penson-Kolb-Hubbard (PKH) model at half filling. It is found that the additional four-body interaction may significantly modify the quantum phase diagram, favoring the presence of the superconducting phase even in the case of two-body repulsions.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
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Authors
Hanqin Ding, Xiaojuan Ma, Jun Zhang,