RQC Seminar

12th RQC Seminar

  • Speaker

    Prof. Ievgen Arkhipov
    (Faculty of Science, Palacky University, Olomouc, Czech Republic）

  • Date

    16:00-17:00 (JST), August 26, 2022 (Friday)

  • Venue

    Hybrid (Zoom / Wako Welfare and Conf. 2F Large Meeting Room RIKEN Wako branch)

  • Title

    Exotic spectral degeneracies in non-Hermitian systems

  • Inquiries

    rqc_info[at]ml.riken.jp

Abstract
In this talk, we will discuss intriguing dynamical behavior of dissipative systems near so-called exceptional points (EPs). EPs are exotic spectral degeneracies where both system’s eigenvectors and eigenvalues coalesce. The presence of such points in the spectrum of non-Hermitian systems can lead to novel and sometimes even counterintuitive effects, e.g., a loss-induced transmission, thus, enriching and extending our knowledge beyond the Hermitian formalism. A special focus will be made on how one can engineer non-Hermitian Hamiltonians with EPs and practically realize them in the state-of-art experimental setups. We will also briefly talk about how the presence of exotic spectral singularities in the low-dimensional systems allows to simulate lattice non-Hermitian phenomena, e.g., a non-Hermitian skin effect, in the synthetic space of such systems.

 Back to top