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Many-Body Non-Hermitian Skin Effect with Exact Steady States in the Dissipative Quantum Link Model
Yu-Min Hu1,2, Zijian Wang1, Biao Lian3
1Tsinghua University, Institute for Advanced Study, Beijing 100084, China.
Physical Review Letters
|January 20, 2026
Summary
We present a dissipative lattice gauge model demonstrating the many-body non-Hermitian skin effect. This model shows particle motion and allows for a new hierarchical skin effect, observable in current simulators.
Area of Science:
- Quantum physics
- Condensed matter physics
- Lattice gauge theory
Background:
- The non-Hermitian skin effect describes the accumulation of particles at the boundaries of a system.
- Understanding many-body effects in non-Hermitian systems is crucial for quantum simulations.
Purpose of the Study:
- To introduce a novel dissipative lattice gauge model.
- To investigate the many-body version of the non-Hermitian skin effect.
- To explore a new type of many-body non-Hermitian skin effect: the hierarchical skin effect.
Main Methods:
- Development of a dissipative lattice gauge model with local gauge symmetry.
- Analysis of dissipative couplings between dynamical gauge fields and the environment.
- Exact construction of a steady state for the many-body non-Hermitian skin effect.
Main Results:
- Demonstration of the many-body non-Hermitian skin effect in the dissipative lattice gauge model.
- Observation of chiral particle motion due to dissipative couplings.
- Realization of a novel hierarchical skin effect with multi-order moment accumulation.
Conclusions:
- The proposed model provides a platform for studying many-body non-Hermitian phenomena.
- The findings are experimentally accessible using state-of-the-art lattice gauge simulators.
- This work opens new avenues for exploring complex quantum systems with engineered dissipation.
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