A5025829740- Quantum Mechanics and Non-Hermitian Physics
- Quantum, superfluid, helium dynamics
- Topological Materials and Phenomena
- Mechanical and Optical Resonators
- Quantum chaos and dynamical systems
- Quasicrystal Structures and Properties
- Advanced Combinatorial Mathematics
- Nonlinear Photonic Systems
- Combustion and Detonation Processes
Korea Advanced Institute of Science and Technology
2022-2025
The concept of synthetic dimensions offers a unique approach to exploring higher-dimensional physics within lower-dimensional systems. Since its initial demonstration in atomic systems, have been implemented various optical platforms, often by forming lattice through the coupling photonic states. In this work, we propose similar method for realizing frequency on phononic platform. Specifically, design parametrically driven ring resonator composed cantilever beams and conduct numerical...
Abstract Non-trivial linking invariant encodes robust information of topological matter. It has been recently shown that the and winding complex eigenenergy strings can classify one-dimensional non-Hermitian However, in higher dimensions, bundles linked emerge such every string is mutually with all other strings. To best our knowledge, a Hopf bundle not experimentally clarified. Here, we attempt to explore by visualizing global structure spinor momentum space two-dimensional electric...
Abstract Line excitations in topological phases are a subject of particular interest because their mutual linking structures encode robust information matter. It has been recently shown that the and winding complex eigenenergy strings can classify one-dimensional non-Hermitian However, higher dimensions, bundles linked emerge such every string is mutually with all other strings. Interestingly, despite being an unconventional structure, Hopf bundle not experimentally clarified. Here, we make...
Line excitations in topological phases are a subject of particular interest because their mutual linking structures encode robust information matter. It has been recently shown that the and winding complex eigenenergy strings can classify one-dimensional non-Hermitian However, higher dimensions, bundles linked emerge such every string is mutually with all other strings. Interestingly, despite being an unconventional structure, Hopf bundle not experimentally clarified. Here, we make first...
We experimentally observe the discrete time-quasicrystalline phase in microwave temporal crystals. In addition, it was confirmed that time quasicrystal is robust against spatial defects to a certain degree.
We report the experimental observation of second-order corner skin modes in a two-dimensional non-Hermitian electric circuit network describable with Su-Schrieffer-Heeger model one spatial direction and Hatano-Nelson orthogonal direction. A Laplacian is reconstructed by series current-voltage measurements, from which complex admittance spectra corresponding voltage distributions are obtained. In L×L square lattice, number found to be 2L, implying that observed originate topology.