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Gender:
MaleDiscipline:
Acoustics. Optics. Condensed Matter PhysicsEducation Level:
With Certificate of Graduation for Doctorate StudyDiscipline:
1 Acoustics;
1 Optics;
1 Condensed Matter Physics
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Publications
Current position: English > Research > Publications
Braiding topology of symmetry-protected degeneracy points in non-Hermitian systems
- Time:2024-04-28
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Journal:
PHYSICAL REVIEW B -
Abstract:
Degeneracy points in non-Hermitian systems are of great interest. While a homotopic framework exists for understanding their behavior in the absence of symmetry, it does not apply to symmetry-protected degeneracy points with reduced codimension. In this work, utilizing algebraic topology, we provide a systematic classification of these symmetry-protected degenerate points and investigate the braid conservation rule followed by them. Using a model Hamiltonian and circuit simulation, we discover that, contrary to simple annihilation, pairwise-created symmetry-protected degeneracy points merge into a higher-order degeneracy point, which goes beyond the abelian picture. Our findings empower researchers across diverse fields to uncover new phenomena and applications harnessing symmetry-protected non-Hermitian degeneracy points. -
Indexed by:
Journal paper -
Volume:
109 -
Issue:
4 -
Page Number:
L041102 -
Translation or Not:
no -
Date of Publication:
2024-01-05 -
Links to published journals:
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.109.L041102