Speaker: Thomas ladecola (lowa State University)

Host: Zhicheng Yang

Time: 10:00-11:00 p.m., May 25, 2023, GMT+8

Venue: Zoom Meeting ID: 963 5796 8034 Password: 125125

Abstract:

We uncover a dynamical entanglement transition in amonitored quantum system that is heralded by a local orderparameter. Classically, chaotic systems can be stochastically controlled onto unstable periodic orbits and exhibit controlledand uncontrolled phases as a function of the rate at which thecontrol is applied. We show that such control transitions persistin open quantum systems where control is implemented with local measurements and unitary feedback. Starting from a simpleclassical model with a known control transition, we define aquantum model that exhibits a diffusive transition between achaotic volume-law entangled phase and a disentangledcontrolled phase.Unlike other entanglement transitions inmonitored quantum circuits, this transition can also be probed by correlation functions without resolving individual quantum trajectories.

Source: School of Physics