Entanglement and Absorbing-State Transitions in Interactive Quantum Dynamics

Understand

Nascent quantum computers motivate the exploration of quantum many-body systems in nontraditional scenarios.

• For example, it has become natural to explore the dynamics of systems evolving under both unitary evolution and measurement.
• Such systems can undergo dynamical phase transitions in the entanglement properties of quantum trajectories conditional on the measurement outcomes.
• Here, we explore dynamics in which one attempts to (locally) use those measurement outcomes to steer the system toward a target state, and we study the resulting phase diagram as a function of the measurement and feedback rates.