Exponential Shortcut to Measurement-Induced Entanglement Phase Transitions

Research output: Contribution to journalArticleScientificpeer-review

13 Downloads (Pure)

Abstract

Recently discovered measurement-induced entanglement phase transitions in monitored quantum circuits provide a novel example of far-from-equilibrium quantum criticality. Here, we propose a highly efficient strategy for experimentally accessing these transitions through fluctuations. Instead of directly measuring entanglement entropy, which requires an exponential number of measurements in the subsystem size, our method provides a scalable approach to entanglement transitions in the presence of conserved quantities. In analogy to entanglement entropy and mutual information, we illustrate how bipartite and multipartite fluctuations can both be employed to analyze the measurement-induced criticality. Remarkably, the phase transition can be revealed by measuring fluctuations of only a handful of qubits.

Original languageEnglish
Article number020401
JournalPhysical Review Letters
Volume131
Issue number2
DOIs
Publication statusPublished - 11 Jul 2023
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • General Physics and Astronomy

Fingerprint

Dive into the research topics of 'Exponential Shortcut to Measurement-Induced Entanglement Phase Transitions'. Together they form a unique fingerprint.

Cite this