An isolated quantum many-body system may be a reservoir that thermalizes its constituents. I will explore an example of the interplay of this thermalization and spontaneous symmetry-breaking, in the ferromagnetic phase of an infinite-range quantum Ising model. For a system of

Although these things can be calculated "exactly", there is an assumption of thermalization. There are few examples of quantum many-body systems where thermalization can be proven; could this become one?

# Dynamical phase transitions, eigenstate thermalization, and Schrodinger cats within the ferromagnetic phase of an infinite-range quantum Ising model

David A. Huse

Princeton University

October 15, 2013