Metrology and multipartite entanglement in measurement-induced phase transition

Author:

Di Fresco Giovanni1,Spagnolo Bernardo1,Valenti Davide1,Carollo Angelo1

Affiliation:

1. Dipartimento di Fisica e Chimica ``Emilio Segrè", Group of Interdisciplinary Theoretical Physics, Università degli studi di Palermo, Viale delle Scienze, Ed. 18, I-90128 Palermo, Italy

Abstract

Measurement-induced phase transition arises from the competition between a deterministic quantum evolution and a repeated measurement process. We explore the measurement-induced phase transition through the Quantum Fisher Information in two different metrological scenarios. We demonstrate through the scaling behavior of the quantum Fisher information the transition of the multi-partite entanglement across the phases. In analogy with standard quantum phase transition, we reveal signature of a measurement-induced phase transition in the non-analytic behaviour of the quantum Fisher information as the measurement strength approaches the critical value. Our results offer novel insights into the features of a quantum systems undergoing measurement-induced phase transition and indicate potential avenues for further exploration in the field of quantum physics.

Funder

Italian ministry of university and research

Publisher

Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften

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