Qian Wang (Author), Ugo Marzolino (Author)

Abstract

Critical behaviour in phase transitions is a resource for enhanced precision metrology. The reason is that the function, known as Fisher information, is superextensive at critical points, and, at the same time, quantifies performances of metrological protocols. Therefore, preparing metrological probes at phase transitions provides enhanced precision in measuring the transition control parameter. We focus on the Lipkin-Meshkov-Glick model that exhibits excited state quantum phase transitions at different magnetic fields. Resting on the model spectral properties, we show broad peaks of the Fisher information, and propose efficient schemes for precision magnetometry. The Lipkin-Meshkov-Glick model was first introduced for superconductivity and for nuclear systems, and recently realised in several condensed matter platforms. The above metrological schemes can be also exploited to measure microscopic properties of systems able to simulate the LipkinMeshkov-Glick model.

Keywords

metrologija;natančnost;meritve;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM - University of Maribor
Publisher: SciPost Foundation
UDC: 537:006.91
COBISS: 204703491 Link will open in a new window
ISSN: 2542-4653
Views: 62
Downloads: 127
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: metrologija;kvantni fazni prehodi;natančnost;meritve;
Type (COBISS): Scientific work
Pages: 33 str.
Volume: ǂVol. ǂ17
Issue: ǂIss. ǂ2
Chronology: 2024
DOI: 10.21468/SciPostPhys.17.2.043
ID: 24791836