| name | non-hermitian-ssh-charge-correlations |
| description | Enhancement of charge correlations and topological markers in interacting non-Hermitian Su-Schrieffer-Heeger models. |
| platforms | ["linux","macos","windows"] |
| tags | ["non-hermitian","topology","SSH-model","charge-density-wave","exceptional-points"] |
| arxiv | 2606.06466 |
Non-Hermitian SSH Model Charge Correlations
Paper: arXiv:2606.06466 - "Enhancement of charge correlations and real-space topological marker on an interacting non-Hermitian Su-Schrieffer-Heeger model"
Authors: Sebastião dos A. Sousa-Júnior et al.
Date: 2026-06-04
Core Methodology
Investigation of topology-charge ordering interplay in interacting non-Hermitian SSH model with:
- Real-space topological marker diagnostics
- Enhanced charge correlations near exceptional points
- Open boundary condition amplification
Key Findings
Topological Phase Mapping
- Real-space topological marker: Robust diagnostic of non-Hermitian topological phases
- Interaction presence: Marker remains reliable under interactions
- CDW onset: Marker signals topological phase breakdown
Non-Hermiticity Enhancement
Open boundary conditions (OBC) lead to:
- Pronounced amplification of staggered charge correlations
- Enhanced interaction effects near exceptional points
- Electronic instabilities promoted by low-energy state accumulation
Periodic vs Open Boundary Conditions
- Periodic boundary conditions (PBC): Moderate changes
- Open boundary conditions (OBC): Dramatic enhancement
- Key difference: Exceptional point proximity effects
Technical Framework
SSH Model with Non-Hermiticity
- Standard SSH: Hermitian Su-Schrieffer-Heeger model
- Non-Hermitian extension: Complex hopping terms
- Interactions: Charge ordering effects included
Phase Diagnostics
- Topological marker: Real-space diagnostic
- Charge correlations: Staggered density measurements
- Complex spectrum: Many-body eigenvalue analysis
- Phase diagram: Topology vs CDW mapping
Exceptional Point Effects
- Low-energy state accumulation: Near exceptional points
- Electronic instabilities: Enhanced by exceptional point proximity
- CDW strengthening: Amplified charge density wave tendencies
Key Results
Topological Robustness
- Topological marker works under interactions
- Consistent signal for topological phase breakdown
- Reliable diagnostic for non-Hermitian topology
Boundary Condition Effects
- OBC dramatically enhances charge correlations
- PBC shows moderate effects
- Exceptional points amplify differences
Interaction Enhancement
- Non-Hermiticity amplifies interaction effects
- CDW onset strengthened near exceptional points
- Electronic instabilities promoted
Implementation Approach
Phase Diagram Construction
- Calculate real-space topological marker
- Measure charge correlations
- Analyze complex many-body spectrum
- Map topology vs CDW phases
Boundary Condition Study
- Compare PBC vs OBC results
- Analyze exceptional point effects
- Measure correlation amplification
Research Applications
- Non-Hermitian topology studies
- Charge ordering in quantum systems
- Exceptional point physics
- Topological phase transitions
- Interacting non-Hermitian systems
Related Skills
- [[non-hermitian-quantum-systems]] - Non-Hermitian physics
- [[topological-quantum-states]] - Topology in quantum systems
- [[exceptional-points-quantum]] - Exceptional point phenomena
References
- arXiv:2606.06466 - Original paper
- SSH model literature - Su-Schrieffer-Heeger model
- Non-Hermitian topology - Exceptional points and topology
Activation: non-hermitian, SSH-model, topology, charge-correlations, exceptional-points, CDW
