2-dimensional Hubbard model. The Hubbard model is an approximate model used to describe the transition between conducting and insulating systems. [1] It is particularly useful in solid-state …

U, the Hubbard model has an additional SU(2) symmetry. Hence, the global symmetry group at half- lling is SO(4) ˘=SU(2) SU(2)=Z 2, where the Z 2 is associated with the fact that …

2013年9月2日 · One truly legendary model is the Hubbard model, independently conceived by Martin Gutzwiller 1, Junjiro Kanamori 2 and, of course, John Hubbard 3 — their original papers …

Exercise2:VerifytheexpressionforH^intermsofthecreationanddestructionoperators. StartwiththeusualexpressionfortheHamiltonian,H^=p^2=2m+m!2x^2=2. Exercise3 ...

The repulsive Hubbard model has been immensely useful in understanding strongly correlated electron systems and serves as the paradigmatic model of the field. Despite its simplicity, it …

1995年12月26日 · The Hubbard model is a "highly oversimplified model" for electrons in a solid which interact with each other through extremely short ranged repulsive (Coulomb) interaction. …

Hubbard model has become a laboratory for theoretical studies of non-perturba-tive effects in strongly correlated electron systems. Many of the tools available for the analysis of such …

2020年5月8日 · Hubbard model and the origin of ferromagnetism It may be interesting and enlightening to briefly discuss the history of the Hubbard model in connection to the research …

electron energy levels, Hubbard proposed to reduce the study to a single localized orbital level per site. This model opens the door to study the interactions between electrons, giving rise to …

2024年5月29日 · The Hubbard Model is a simplified mathematical framework used primarily in solid-state physics to study the behavior of electrons in a lattice. It focuses on the electronic …