visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-08-18 10:00 
연사  
장소 E6-1 #1323 
1) Date / Time 
    - August 18, 2022 / 10:00 AM (KST)
 
2) Place / ZOOM 
    Room 1323, KAIST Natural Sciences Lecture Hall(E6) (자연과학동 1323호)
 
3) Speaker
    Dr. Kyoung-Min Kim (Center for Theoretical Physics of Complex Systems, IBS)
 
4) Talk Title
    Disorder-driven phase transition in the second-order non-Hermitian skin effect
 
5) Abstract
    The non-Hermitian skin effect exhibits a collapse of extended bulk modes into an extensive number of localized boundary states in the open boundary condition. Here, we demonstrate a disorder-driven phase transition of a trivial non-Hermitian system to the higher-order non-Hermitian skin effect phase. In contrast to clean systems, the disorder-induced boundary modes form an arc in the complex energy plane, which is a manifestation of the disorder-driven energy-dependent phase transition. At the phase transition, localized corner modes and bulk modes characterized by trivial Hamiltonians coexist within a single band, while they remain separated in the complex energy plane. This behavior is analogous to the mobility edge phenomena in disordered Hermitian systems. Using effective medium theory and numerical diagonalizations, we provide a systematic characterization of the disorder-driven phase transition.
번호 날짜 연사 제목
217 2022-04-25 16:00    Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
216 2022-04-28 16:00    (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
215 2022-05-02 16:00    What can we learn from the history of science and technology?(우리말강의)
214 2022-05-09 16:00    Searching for new electronic properties in correlated material flatland
213 2022-05-10 16:00    (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
212 2022-05-11 16:00    Gravity as a phenomenon in quantum dynamics
211 2022-05-12 16:00    New frontiers of electroweak physics at the LHC
210 2022-05-13 14:30    Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
209 2022-05-13 16:00    High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
208 2022-05-16 16:00    Design synthetic topological matter with atoms and lights
207 2022-05-18 16:00    Geometry, Algebra, and Quantum Field Theory
206 2022-05-19 15:00    (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
205 2022-05-19 15:00    (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
204 2022-05-19 16:00    Chasing Long Standing Neutrino Anomalies with MicroBooNE
203 2022-05-20 11:00    (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
202 2022-05-23 16:00    Novel electronic transport in topological van der Waals magnets
201 2022-05-25 14:00    Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia file
200 2022-05-25 16:00    Uncovering New Lampposts for Dark Matter: Continuum or Conformal
199 2022-05-26 16:00    (광학분야 특별세미나)Topological photonic devices
198 2022-05-27 11:00    Current Status and Future Plans of ADMX file