Physics, Condensed Matter Physics, Quantum Computing.
opposite effect: it broadly discourages the free tunnelling of electrons. So Mott insulators are simply described by Hubbard models with U/t ≫ 1! In a similar sense, we can describe the emergence of conductivity as the ratio U/t decreases below 1 (t ≫ U). In the limit as U/t → 0, the substance