Dec. 17, 2020 at 4 p.m. in usually Newton-Raum, Staudinger Weg 9, 01-122 and via Zoom

Prof. Dr. P.G.J. van Dongen
Institut für Physik, KOMET 7

Jun.-Prof. Dr. J. Marino
Institut für Physik, KOMET 7

Entanglement dynamics in hybrid quantum circuits
Matthew P. A. Fisher (UC Santa Barbara)

The inexorable growth of non-local quantum entanglement is the key feature that distinguishes quantum from classical systems. Monitoring an open system (by making projective measurements) can compete against entanglement growth, leading to a many-body quantum Zeno effect. A hybrid quantum circuit model consisting of both unitary gates and projective measurements exhibits a quantum dynamical phase transition between a weak measurement phase and a quantum Zeno phase. Detailed properties of the weak measurement phase - including relations to quantum error correcting codes - and of the critical properties of this novel quantum entanglement transition will be described.