| Title: | Precision magnetometry exploiting excited state quantum phase transitions |
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| Authors: | ID Wang, Qian (Author)
ID Marzolino, Ugo (Author) |
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| Files: |  SciPostPhys_17_2_043.pdf (1,52 MB)
MD5: 0E1A2E3C462F84AF6355BD21E537DCBB
 https://www.scipost.org/SciPostPhys.17.2.043
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UM - University of Maribor
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| 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. |
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| Keywords: | magnetometry, quantum phase transitions, precision, measurements |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 17.07.2023 |
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| Article acceptance date: | 23.07.2024 |
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| Publication date: | 09.08.2024 |
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| Publisher: | SciPost Foundation |
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| Year of publishing: | 2024 |
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| Number of pages: | Str. 1-33 |
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| Numbering: | Letn. 17, Št. 2, št. članka 043 |
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| PID: | 20.500.12556/DKUM-90009  |
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| UDC: | 537:006.91 |
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| ISSN on article: | 2542-4653 |
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| COBISS.SI-ID: | 204703491 |
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| DOI: | 10.21468/SciPostPhys.17.2.043 |
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| Publication date in DKUM: | 22.08.2024 |
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| Views: | 62 |
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| Downloads: | 10 |
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| Metadata: |    |
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| Categories: | Misc.
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