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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
Effects of non-Hermitian perturbations on Weyl Hamiltonians with arbitrary topological charges
- Time:2020-05-16
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Journal:
Physical Review B -
Abstract:
We provide a systematic study of non-Hermitian topologically charged systems. Starting from a Hermitian Hamiltonian supporting Weyl points with arbitrary topological charge, adding a non-Hermitian perturbation transforms the Weyl points to one-dimensional exceptional contours. We analytically prove that the topological charge is preserved on the exceptional contours. In contrast to Hermitian systems, the addition of gain and loss allows for a new class of topological phase transition: when two oppositely charged exceptional contours touch, the topological charge can dissipate without opening … -
Volume:
97 -
Issue:
7 -
Page Number:
075128 -
Translation or Not:
no -
Date of Publication:
2018-02-13