301st RQC Seminar

• 講演者

  Prof. Ievgen Arkhipov
  ( Faculty of Physics, Palacky University, the Czech Republic )

• 日程

  2026年9月4日(金), 16:00 - 17:00(4:00 p.m.-5:00 p.m.)

• 開催場所

  ハイブリッド（Zoom,
  Wako Main Research 3F 345-347 Seminar Room / 研究本館3階 セミナー室(345-347) C01）

• 講演タイトル

  Controlling Chiral State Dynamics in Non-Hermitian Systems

• お問合せ

  norilab_rqc_assist[at]ml.riken.jp

講演概要
Non-Hermitian systems exhibit a variety of unusual dynamical effects associated with exceptional points and other spectral singularities, including chiral state switching. At the same time, their complex spectra often make the dynamics unstable and can lead to a breakdown of adiabaticity, making it difficult to reliably control the final state of the system.
In this talk, I will discuss several ways to overcome these limitations and to control both chiral and symmetric switching dynamics. I will show that nonadiabatic transitions can be strongly suppressed, or even completely eliminated, either by choosing suitable evolution trajectories or by exploiting the interplay between exceptional points and diabolic points in the spectrum. This makes it possible to realize robust and controllable state transfer in multiqubit and multimode photonic systems.
I will also present experimental results that confirm these theoretical predictions and demonstrate that the corresponding switching protocols can be implemented in practice. Overall, the talk will illustrate how spectral singularities in non-Hermitian systems can be turned from a source of dynamical instability into a useful resource for controlled state manipulation.