Detecting entanglement phase transitions in monitored quantum circuits through fluctuations

Date

Mar 28, 2024

Time

11:00 AM - 12:00 PM

Speaker

Dr. Ali Ghorban Zadeh Moghaddam

Affiliation

Tampere University, Finland

Language

en

Main Topic

Materialien

Host

Grit Rötzer

Description

Recently discovered measurement-induced entanglement phase transitions in monitored quantum circuits provide a novel example of far-from-equilibrium quantum criticality. However, a fundamental impediment to unraveling these phase transitions is characterizing entanglement through quantum-state tomography, which requires an exponential number of measurements relative to subsystem size in practice. In this talk, I will introduce an efficient strategy that bypasses the need for direct measurements of entanglement entropy. Our proposed method offers a scalable approach to capturing entanglement transitions in symmetric monitored quantum circuits. Drawing parallels to entanglement entropy and mutual information, we also demonstrate the utility of both bipartite and multipartite fluctuations in analyzing measurement-induced criticality. Remarkably, I will argue that the phase transition can be revealed by measuring fluctuations of only a handful of qubits. .

Links

• Seminars at the IFW

Last modified: Mar 28, 2024, 7:36:52 AM