Coherent pairing states for the Hubbard model
- 8 May 1998
- journal article
- letter
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 31 (18) , L355-L360
- https://doi.org/10.1088/0305-4470/31/18/004
Abstract
We consider the Hubbard model and its extensions on bipartite lattices. We define a dynamical group based on the -pairing operators introduced by Yang, and define coherent pairing states, which are combinations of eigenfunctions of -operators. These states permit exact calculations of numerous physical properties of the system, including energy, various fluctuations and correlation functions, including pairing off-diagonal long-range order to all orders. This approach is complementary to BCS, in that these are superconducting coherent states associated with the exact model, although they are not eigenstates of the Hamiltonian.Keywords
All Related Versions
This publication has 17 references indexed in Scilit:
- Exact superconducting ground states of a model for strongly correlated heavy-fermion systemsPhysics Letters A, 1996
- Exact Ground States of Generalized Hubbard ModelsPhysical Review Letters, 1995
- Superconductivity in an exactly solvable Hubbard model with bond-charge interactionPhysical Review B, 1995
- Pairing as a Mechanism of Superconductivity in Models of Strongly Correlated ElectronsPhysical Review Letters, 1995
- Exact Solution of a Hubbard Chain with Bond-Charge InteractionPhysical Review Letters, 1994
- Electronic model for superconductivityPhysical Review Letters, 1993
- New exactly solvable model of strongly correlated electrons motivated by high-superconductivityPhysical Review Letters, 1992
- ηpairing and off-diagonal long-range order in a Hubbard modelPhysical Review Letters, 1989
- New symmetry properties of a class of Hubbard modelsZeitschrift für Physik B Condensed Matter, 1981
- Series of hadron energy levels as representations of non-compact groupsPhysics Letters, 1965