2018/06/30 by Zhaoyang Zhang, Feng Li, G. Malpuech +11 · 1 citation
Physics and Astronomy · #Condensed matter physics #Dirac (video compression format) #Geometric phase #Graphene #Gravitational singularity #Lattice (music) #Photonics #Physics #Quantum #Quantum mechanics #Quantum optics and atomic interactions #Random lasers and scattering media #Strong Light-Matter Interactions #Topological defect #Topology (electrical circuits) #Vortex #Wave packet #physics.optics
paper · pdf · doi:10.1103/physrevlett.122.233905
published as Phys. Rev. Lett. 122, 233905 (2019)
arxiv created 2018/12/09 · openalex publication_date 2019/06/14 · arxiv updated 2019/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Topological defects, such as quantum vortices, determine the properties of quantum fluids. Their study has been at the center of activity in solid state and BEC communities. In parallel, the nontrivial behavior of linear wave packets with complex phase patterns was investigated by singular optics. Here, we study the formation, evolution, and interaction of optical vortices in wave packets at the Dirac point in photonic graphene. We show that while their exact behavior goes beyond the Dirac equation and requires a full account of the lattice properties, it can be still approximately described by an effective theory considering the phase singularities as "particles". These particles are capable of mutual interaction, with their trajectory obeying the laws of dynamics.