Recently, experimental realizations of this model have been achieved in optical lattices, first a bosonic analogue and later the original fermionic version in work of K?hl et al. An important limiting case was derived by Spal
Recently, experimental realizations of this model have been achieved in optical lattices, first a bosonic analogue and later the original fermionic version in work of K?hl et al. An important limiting case was derived by Spalek in 1977, applying a projection operator to remove double-occupancy states. This is a large U limit of it, called the t-J model. It was introduced by its namesake in 1963 in a study that revealed a type of metal-insulator transition. Its Hamiltonian involves a hopping term that moves an electron from one site to another, and a potential energy term giving on-site Coulomb repulsion. For 10 points, what is this model of interacting electrons, introduced in 1963 by a British physicist who also invented a transformation named for him and Stratonovich?
Recently, experimental realizations of this model have been achieved in optical lattices, first a bosonic analogue and later the original fermionic version in work of K?hl et al.
Hubbard model