Entanglement dynamics in non-unitary circuits

Abstract: Recent work has shown that unitary circuits subject to repeated projective measurements can undergo an entanglement transition as a function of the measurement rate. This transition is generally understood in terms of a competition between the scrambling effects of unitary dynamics and the disentangling effects of measurements. I will discuss how, surprisingly, entanglement transitions are possible even in the absence of unitary dynamics in “measurement only” models. I will talk about the entanglement phase diagrams in these models, and also present results on measures of locality under non-unitary dynamics. Finally, I will discuss a recent proposal to measure entanglement without issues of postselection in a class of non-unitary circuits using ideas of spacetime duality.

condensed matterchaotic dynamicsexactly solvable and integrable systemsquantum physics

Audience: researchers in the topic

Quantum Chaos 2020 Seminars

Series comments: A series of online talks about topics related to Quantum Chaos in its various forms, including (but not limiting to): Manifestations of chaos in quantum systems, quantum information scrambling, ergodicity and thermalization in closed many-body quantum systems, and quantum simulations of complex quantum dynamics .

Talks given by senior researchers as well as students and postdocs.