Scaling of quantum Zeno dynamics in many-body systems

Wing Chi Yu; Li-Gang Wang; Shi-Jian Gu; Hai-Qing Lin

doi:10.1088/1751-8113/45/7/075306

Scaling of quantum Zeno dynamics in many-body systems

Wing Chi Yu
, Li-Gang Wang
, Shi-Jian Gu^*
, Hai-Qing Lin

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

We study the quantum Zeno effect (QZE) in a many-body system, namely the Lipkin-Meshkov-Glick model, coupled to a central qubit. Our result shows that in order to observe QZE in the symmetry-broken phase of the model, the frequency of the projective measurement should be of comparable order to that of the system sizes. However, in the polarized phase of the model, the QZE can be easily observed by frequent measurements.

Original language	English
Article number	075306
Journal	Journal of Physics A: Mathematical and Theoretical
Volume	45
Issue number	7
Online published	1 Feb 2012
DOIs	https://doi.org/10.1088/1751-8113/45/7/075306
Publication status	Published - 24 Feb 2012
Externally published	Yes

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title = "Scaling of quantum Zeno dynamics in many-body systems",

abstract = "We study the quantum Zeno effect (QZE) in a many-body system, namely the Lipkin-Meshkov-Glick model, coupled to a central qubit. Our result shows that in order to observe QZE in the symmetry-broken phase of the model, the frequency of the projective measurement should be of comparable order to that of the system sizes. However, in the polarized phase of the model, the QZE can be easily observed by frequent measurements.",

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T1 - Scaling of quantum Zeno dynamics in many-body systems

AU - Yu, Wing Chi

AU - Wang, Li-Gang

AU - Gu, Shi-Jian

AU - Lin, Hai-Qing

PY - 2012/2/24

Y1 - 2012/2/24

N2 - We study the quantum Zeno effect (QZE) in a many-body system, namely the Lipkin-Meshkov-Glick model, coupled to a central qubit. Our result shows that in order to observe QZE in the symmetry-broken phase of the model, the frequency of the projective measurement should be of comparable order to that of the system sizes. However, in the polarized phase of the model, the QZE can be easily observed by frequent measurements.

AB - We study the quantum Zeno effect (QZE) in a many-body system, namely the Lipkin-Meshkov-Glick model, coupled to a central qubit. Our result shows that in order to observe QZE in the symmetry-broken phase of the model, the frequency of the projective measurement should be of comparable order to that of the system sizes. However, in the polarized phase of the model, the QZE can be easily observed by frequent measurements.

UR - https://www.scopus.com/pages/publications/84863181419

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U2 - 10.1088/1751-8113/45/7/075306

DO - 10.1088/1751-8113/45/7/075306

M3 - RGC 21 - Publication in refereed journal

SN - 1751-8113

VL - 45

JO - Journal of Physics A: Mathematical and Theoretical

JF - Journal of Physics A: Mathematical and Theoretical

IS - 7

M1 - 075306

ER -

Scaling of quantum Zeno dynamics in many-body systems

Abstract

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