Universal characters, a natural generalisation of the classical Schur functions, have emerged as a powerful algebraic tool in the study of integrable systems. They are defined as polynomials attached ...

Weak perturbations can drive an interacting many-particle system far from its initial equilibrium state if one is able to pump into degrees of freedom approximately protected by conservation laws.

Thermalization in classical systems can be well-understood by ergodicity. While ergodicity is absent for quantum systems, it is generally believed that the non-integrable quantum systems should ...