Chaos in Dirac electron optics: Emergence of a relativistic quantum chimera
| Autor: | Ying-Cheng Lai, Guanglei Wang, Liang Huang, Hong-Ya Xu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Dynamical systems theory
Integrable system Dirac (software) FOS: Physical sciences General Physics and Astronomy 02 engineering and technology 01 natural sciences symbols.namesake Quantum mechanics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics Spin (physics) Quantum Physics Quantum Physics Spin polarization Condensed Matter - Mesoscale and Nanoscale Physics 021001 nanoscience & nanotechnology Nonlinear Sciences - Chaotic Dynamics Dirac fermion symbols Scattering theory Chaotic Dynamics (nlin.CD) Quantum Physics (quant-ph) 0210 nano-technology |
| Popis: | We uncover a remarkable quantum scattering phenomenon in two-dimensional Dirac material systems where the manifestations of both classically integrable and chaotic dynamics emerge simultaneously and are electrically controllable. The distinct relativistic quantum fingerprints associated with different electron spin states are due to a physical mechanism analogous to chiroptical effect in the presence of degeneracy breaking. The phenomenon mimics a chimera state in classical complex dynamical systems but here in a relativistic quantum setting - henceforth the term "Dirac quantum chimera," associated with which are physical phenomena with potentially significant applications such as enhancement of spin polarization, unusual coexisting quasibound states for distinct spin configurations, and spin selective caustics. Experimental observations of these phenomena are possible through, e.g., optical realizations of ballistic Dirac fermion systems. 6 pages, 4 figures |
| Databáze: | OpenAIRE |
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