Classicalization Clearly: Quantum Transition into States of Maximal Memory Storage Capacity

Understand

Classicalization is a phenomenon of redistribution of energy - initially stored in few hard quanta - into the high occupation numbers of the soft modes, described by a final state that is approximately classical.

• Using an effective Hamiltonian, we first show why the transition amplitudes that increase occupation numbers are exponentially suppressed and how a very special family of classicalizing theories compensates this suppression.
• This is thanks to a large micro-state entropy generated by the emergent gapless modes around the final classical state.
• The dressing of the process by the super-soft quanta of these modes compensates the exponential suppression of the transition probability.