Collision rate ansatz for quantum integrable systems

Understand

For quantum integrable systems the currents averaged with respect to a generalized Gibbs ensemble are revisited.

• An exact formula is known, which we call "collision rate ansatz".
• While there is considerable work to confirm this ansatz in various models, our approach uses the symmetry of the current-charge susceptibility matrix, which holds in great generality.
• Besides some technical assumptions, the main input is the availability of a self-conserved current, i.e.