4 papers
Universal purification dynamics of monitored Clifford circuits
Beatrice Magni, Federico Gerbino, Xhek Turkeshi +1
Quantum circuits under sufficiently weak monitoring purify on a timescale exponentially long in the system size. This slowness underlies a universal purification dynamics, wh…
Universal purification dynamics in real non-unitary quantum processes
Federico Gerbino, Donghoon Kim, Guido Giachetti +2
We study purification dynamics in monitored quantum processes governed by ensembles of quantum circuits in different random-matrix symmetry classes. We analyze the universal aspect…
Field theory for monitored Brownian SYK clusters
Anastasiia Tiutiakina, Hugo Lóio, Guido Giachetti +2
We consider the time evolution of multiple clusters of Brownian Sachdev-Ye-Kitaev (SYK), i.e. systems of N Majorana fermions with a noisy interaction term. In addition to the unita…
Measurement-Induced Phase Transition in State Estimation of Chaotic Systems and the Directed Polymer
Federico Gerbino, Guido Giachetti, Pierre Le Doussal +1
We introduce a solvable model of a measurement-induced phase transition (MIPT) in a deterministic but chaotic dynamical system with a positive Lyapunov exponent. In this setup, an…