Observation of non-Hermitian skin effect in thermal diffusion
Copyright © 2024 Science China Press. Published by Elsevier B.V. and Science China Press. Published by Elsevier B.V. All rights reserved..
The paradigm shift of Hermitian systems into the non-Hermitian regime profoundly modifies inherent property of the topological systems, leading to various unprecedented effects such as the non-Hermitian skin effect (NHSE). In the past decade, the NHSE has been demonstrated in quantum, optical and acoustic systems. Beside those wave systems, the NHSE in diffusive systems has not yet been observed, despite recent abundant advances in the study of topological thermal diffusion. In this work, we design a thermal diffusion lattice based on a modified Su-Schrieffer-Heeger model and demonstrate the diffusive NHSE. In the proposed model, the asymmetric temperature field coupling inside each unit cell can be judiciously realized by appropriate configurations of structural parameters. We find that the temperature fields trend to concentrate toward the target boundary which is robust against initial excitation conditions. We thus experimentally demonstrated the NHSE in thermal diffusion and verified its robustness against various defects. Our work provides a platform for exploration of non-Hermitian physics in the diffusive systems, which has important applications in efficient heat collection, highly sensitive thermal sensing and others.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - year:2024 |
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| Enthalten in: |
Science bulletin - (2024) vom: 02. März |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Yun-Kai [VerfasserIn] |
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| Links: |
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| Themen: |
Asymmetric coupling |
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| Anmerkungen: |
Date Revised 19.03.2024 published: Print-Electronic Citation Status Publisher |
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| doi: |
10.1016/j.scib.2024.02.040 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM369932579 |
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| 500 | |a Date Revised 19.03.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status Publisher | ||
| 520 | |a Copyright © 2024 Science China Press. Published by Elsevier B.V. and Science China Press. Published by Elsevier B.V. All rights reserved. | ||
| 520 | |a The paradigm shift of Hermitian systems into the non-Hermitian regime profoundly modifies inherent property of the topological systems, leading to various unprecedented effects such as the non-Hermitian skin effect (NHSE). In the past decade, the NHSE has been demonstrated in quantum, optical and acoustic systems. Beside those wave systems, the NHSE in diffusive systems has not yet been observed, despite recent abundant advances in the study of topological thermal diffusion. In this work, we design a thermal diffusion lattice based on a modified Su-Schrieffer-Heeger model and demonstrate the diffusive NHSE. In the proposed model, the asymmetric temperature field coupling inside each unit cell can be judiciously realized by appropriate configurations of structural parameters. We find that the temperature fields trend to concentrate toward the target boundary which is robust against initial excitation conditions. We thus experimentally demonstrated the NHSE in thermal diffusion and verified its robustness against various defects. Our work provides a platform for exploration of non-Hermitian physics in the diffusive systems, which has important applications in efficient heat collection, highly sensitive thermal sensing and others | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Asymmetric coupling | |
| 650 | 4 | |a Heat diffusion | |
| 650 | 4 | |a Non-Hermitian skin effect | |
| 650 | 4 | |a Thermal metamaterial | |
| 700 | 1 | |a Cao, Pei-Chao |e verfasserin |4 aut | |
| 700 | 1 | |a Qi, Minghong |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Qiang-Kai-Lai |e verfasserin |4 aut | |
| 700 | 1 | |a Gao, Feng |e verfasserin |4 aut | |
| 700 | 1 | |a Peng, Yu-Gui |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Ying |e verfasserin |4 aut | |
| 700 | 1 | |a Zhu, Xue-Feng |e verfasserin |4 aut | |
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