Physics of Condensed Matter

Quantum statistical mechanics mediated formalism and its application to the solid state physics are the main concern. The one- and two-body green functions are evaluated numerically, aiming to grasp the elementary  excitation as well as the AC susceptibilities. The importance of interaction is emphasized. The non-equilibrium statistical mechanics is also under the scope in terms of the AC transport properties.

	Asst. Prof. NISHIYAMA Yoshihiro E-mail: nishiy-y＠(cc.okayama-u.ac.jp)  spectral properties, quantum spin system Directory of Researchers 　Link to group homepage

In practical simulations based on the Monte Carlo and numerical diagonalization based approaches have characteristics aspects. Here, the numerical diagonalization is successfully applied to the spin model under the pure imaginary magnetic field.