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Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems

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Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems. / Leung, Chun; Romito, Alessandro.
In: Physical review a, Vol. 111, No. 2, 022427, 18.02.2025.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Leung, C & Romito, A 2025, 'Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems', Physical review a, vol. 111, no. 2, 022427. https://doi.org/10.1103/PhysRevA.111.022427

APA

Leung, C., & Romito, A. (2025). Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems. Physical review a, 111(2), Article 022427. https://doi.org/10.1103/PhysRevA.111.022427

Vancouver

Leung C, Romito A. Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems. Physical review a. 2025 Feb 18;111(2):022427. doi: 10.1103/PhysRevA.111.022427

Author

Leung, Chun ; Romito, Alessandro. / Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems. In: Physical review a. 2025 ; Vol. 111, No. 2.

Bibtex

@article{ff3a8a0dda374e83ba45cdc39667eaa1,
title = "Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems",
abstract = "The interplay between information-scrambling Hamiltonians and local continuous measurements hosts platforms for exotic measurement-induced phase transition in out-of-equilibrium steady states. Here, we consider such transitions under the addition of local random white noise and measurement inefficiency in an XX spin chain. We identify a nonmonotonic dependence on the local noise strength in both the averaged entanglement and operator correlations, specifically the subsystem parity variance. While the nonmonotonicity persists at any finite efficiency for the operator correlations, it disappears at finite inefficiency for the entanglement. The analysis of scaling with the system size in a finite-length chain indicates that, at finite efficiency, this effect leads to distinct measurement-induced phase transitions for operator correlations and entanglement. Our result hints at a difference between area-law entanglement scaling and Zeno-localized phases for inefficient monitoring.",
author = "Chun Leung and Alessandro Romito",
year = "2025",
month = feb,
day = "18",
doi = "10.1103/PhysRevA.111.022427",
language = "English",
volume = "111",
journal = "Physical review a",
issn = "1050-2947",
publisher = "American Physical Society",
number = "2",

}

RIS

TY - JOUR

T1 - Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems

AU - Leung, Chun

AU - Romito, Alessandro

PY - 2025/2/18

Y1 - 2025/2/18

N2 - The interplay between information-scrambling Hamiltonians and local continuous measurements hosts platforms for exotic measurement-induced phase transition in out-of-equilibrium steady states. Here, we consider such transitions under the addition of local random white noise and measurement inefficiency in an XX spin chain. We identify a nonmonotonic dependence on the local noise strength in both the averaged entanglement and operator correlations, specifically the subsystem parity variance. While the nonmonotonicity persists at any finite efficiency for the operator correlations, it disappears at finite inefficiency for the entanglement. The analysis of scaling with the system size in a finite-length chain indicates that, at finite efficiency, this effect leads to distinct measurement-induced phase transitions for operator correlations and entanglement. Our result hints at a difference between area-law entanglement scaling and Zeno-localized phases for inefficient monitoring.

AB - The interplay between information-scrambling Hamiltonians and local continuous measurements hosts platforms for exotic measurement-induced phase transition in out-of-equilibrium steady states. Here, we consider such transitions under the addition of local random white noise and measurement inefficiency in an XX spin chain. We identify a nonmonotonic dependence on the local noise strength in both the averaged entanglement and operator correlations, specifically the subsystem parity variance. While the nonmonotonicity persists at any finite efficiency for the operator correlations, it disappears at finite inefficiency for the entanglement. The analysis of scaling with the system size in a finite-length chain indicates that, at finite efficiency, this effect leads to distinct measurement-induced phase transitions for operator correlations and entanglement. Our result hints at a difference between area-law entanglement scaling and Zeno-localized phases for inefficient monitoring.

U2 - 10.1103/PhysRevA.111.022427

DO - 10.1103/PhysRevA.111.022427

M3 - Journal article

VL - 111

JO - Physical review a

JF - Physical review a

SN - 1050-2947

IS - 2

M1 - 022427

ER -