Strong-coupling expansions at finite temperatures: Application to quantum disordered and quantum critical phases
Strong-coupling expansions at finite temperatures: Application to quantum disordered and quantum critical phases
By combining conventional finite-temperature many-body perturbation theory with cluster expansions, we develop a systematic method to carry out high order arbitrary temperature perturbative calculations on the computer. The method is well suited to studying the thermodynamic properties of quantum disordered and quantum critical phases at finite temperatures. As an application, …