Hole-hole effective interaction in the two-dimensional Hubbard model
- 1 October 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (10), 6877-6880
- https://doi.org/10.1103/physrevb.42.6877
Abstract
We present the first exact results of the ground-state energy in the two-dimensional Hubbard model on a 4×4 cluster for several values of U and fillings. The behavior of the binding energy of two holes as a function of U is discussed together with some analytical results in limiting cases. The analysis of the hole-hole correlation function allows one to determine the range of values of U where binding might be seen.Keywords
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