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Scale-free non-Hermitian skin effect in a boundary-dissipated spin chain
by He-Ran Wang, Bo Li, Fei Song, Zhong Wang
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Submission summary
| Authors (as registered SciPost users): | He-Ran Wang |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2301.11896v3 (pdf) |
| Date accepted: | Oct. 26, 2023 |
| Date submitted: | Oct. 24, 2023, 4:21 a.m. |
| Submitted by: | He-Ran Wang |
| Submitted to: | SciPost Physics |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
We study the open XXZ spin chain with a PT-symmetric non-Hermitian boundary field. We find an interaction-induced scale-free non-Hermitian skin effect by using the coordinate Bethe ansatz. The steady state and the ground state in the PT broken phase are constructed, and the formulas of their eigen-energies in the thermodynamic limit are obtained. The differences between the many-body scale-free states and the boundary string states are explored, and the transition between the two at isotropic point is investigated. We also discuss an experimental scheme to verify our results.
Published as SciPost Phys. 15, 191 (2023)