Exceptional dynamics of interacting spin liquids
We show that interactions in quantum spin liquids can result in non-Hermitian phenomenology that differs qualitatively from mean-field expectations. We demonstrate this in two prominent cases through the effects of phonons and disorder on a Kitaev honeycomb model. Using analytic and numerical calcul...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-11-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.L042025 |
| _version_ | 1797210562888728576 |
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| author | Kang Yang Daniel Varjas Emil J. Bergholtz Sid Morampudi Frank Wilczek |
| author_facet | Kang Yang Daniel Varjas Emil J. Bergholtz Sid Morampudi Frank Wilczek |
| author_sort | Kang Yang |
| collection | DOAJ |
| description | We show that interactions in quantum spin liquids can result in non-Hermitian phenomenology that differs qualitatively from mean-field expectations. We demonstrate this in two prominent cases through the effects of phonons and disorder on a Kitaev honeycomb model. Using analytic and numerical calculations, we show the generic appearance of exceptional points and rings depending on the symmetry of the system. Their existence is reflected in dynamical observables including the dynamic structure function measured in neutron scattering. The results point to different phenomenological features in realizable spin liquids that must be incorporated into the analysis of experimental data and also indicate that spin liquids could be generically stable to wider classes of perturbations. |
| first_indexed | 2024-04-24T10:12:34Z |
| format | Article |
| id | doaj.art-2cd8829f5b3f4b548aaebc60d1b6df24 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:12:34Z |
| publishDate | 2022-11-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-2cd8829f5b3f4b548aaebc60d1b6df242024-04-12T17:26:03ZengAmerican Physical SocietyPhysical Review Research2643-15642022-11-0144L04202510.1103/PhysRevResearch.4.L042025Exceptional dynamics of interacting spin liquidsKang YangDaniel VarjasEmil J. BergholtzSid MorampudiFrank WilczekWe show that interactions in quantum spin liquids can result in non-Hermitian phenomenology that differs qualitatively from mean-field expectations. We demonstrate this in two prominent cases through the effects of phonons and disorder on a Kitaev honeycomb model. Using analytic and numerical calculations, we show the generic appearance of exceptional points and rings depending on the symmetry of the system. Their existence is reflected in dynamical observables including the dynamic structure function measured in neutron scattering. The results point to different phenomenological features in realizable spin liquids that must be incorporated into the analysis of experimental data and also indicate that spin liquids could be generically stable to wider classes of perturbations.http://doi.org/10.1103/PhysRevResearch.4.L042025 |
| spellingShingle | Kang Yang Daniel Varjas Emil J. Bergholtz Sid Morampudi Frank Wilczek Exceptional dynamics of interacting spin liquids Physical Review Research |
| title | Exceptional dynamics of interacting spin liquids |
| title_full | Exceptional dynamics of interacting spin liquids |
| title_fullStr | Exceptional dynamics of interacting spin liquids |
| title_full_unstemmed | Exceptional dynamics of interacting spin liquids |
| title_short | Exceptional dynamics of interacting spin liquids |
| title_sort | exceptional dynamics of interacting spin liquids |
| url | http://doi.org/10.1103/PhysRevResearch.4.L042025 |
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