Abstract

While many-body quantum physics has traditionally focused on the properties of cold matter in thermal equilibrium, emerging noisy intermediate-scale quantum (NISQ) platforms allow access to far-from-equilibrium dynamics with local space and time control over interactions. In this new era of “interactive quantum dynamics”, a key challenge is to identify universal features of non-equilibrium quantum dynamics, transport, and many-body entanglement. In this talk, I will discuss the recently discovered “learnability phase transitions” that occur in monitored quantum systems and separate phases characterized by the amount of quantum information that can be extracted from measurements. I will review our understanding of such transitions in an observer’s ability to infer properties of a quantum (or even classical) system from measurements.