RQC Seminar

93rd RQC Seminar

• Speaker

  Prof. Yueh-Nan Chen
  ( Department of Physics and Center for Quantum Frontiers of Research ＆ Technology (QFort),
  National Cheng Kung University )

• Date

  16:00-17:00, November 1, 2023 (Wednesday)

• Venue

  Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room/ 研究本館3階 セミナー室(345-347) C01）

• Title

  Effects of superposed trajectories on open quantum systems

• Inquiries

  rqc_info[at]ml.riken.jp

Abstract
Superposition of trajectories, which modify quantum evolutions by superposing paths through interferometry, has been utilized to enhance various quantum communication tasks. However, little is known about its impact from the viewpoint of open quantum systems. Thus, we examine this subject from the perspective of system-environment interactions. We show that the superposition of multiple trajectories can result in quantum state freezing, suggesting a space-time dual to the quantum Zeno effect. In addition, nontrivial Dicke-like super (sub) radiance can be triggered without utilizing multiatom correlations. We further show that the superposition of trajectories can be used to enhance the performance of the steering heat engine and the quantum battery.