Boundary Conformal Field Theory After Measurements

Explore the impact of measurements on quantum critical systems in this lecture by Sara Murciano from Caltech/Burke Institute. Delve into the study of Ising chains using an explicit protocol involving uncorrelated ancillae entangled with the critical chain and subsequently measured projectively. Discover how these measurements can significantly modify the Ising order-parameter scaling dimension and how varying the measurement basis can induce a flow towards different conformal invariant boundary conditions. Examine the validation of this analysis for two distinct microscopic realizations of the same critical theory. Investigate the effects of measurements on the tricritical Ising model, uncovering how they can trigger a non-trivial flow to different boundary conditions. Gain insights into the fascinating interplay between quantum measurements and boundary conformal field theory in critical systems.