Noncanonical statistics of a spin-boson model: Theory and exact Monte Carlo simulations
Noncanonical statistics of a spin-boson model: Theory and exact Monte Carlo simulations
Equilibrium canonical distribution in statistical mechanics assumes weak system-bath coupling (SBC). In real physical situations this assumption can be invalid, and equilibrium quantum statistics of the system may be noncanonical. By exploiting both polaron transformation and perturbation theory in a spin-boson model, an analytical treatment is advocated to study noncanonical …