Exotic spectral degeneracies in non-conservative quantum systems

量子物理学・ナノサイエンス第312回セミナー

概要

In this talk, we will discuss the existence of exotic spectral degeneracies, so-called exceptional points (EPs), in non-conservative quantum systems. At the EP, not only eigenfrequencies of a given evolution operator coalesce but also its corresponding eigenvectors, thus signaling the presence of the spectral singularity in a system. In particular, we will talk about the EPs in open, i.e., dissipative, quantum systems, whose dynamics is governed by a quantum Liouvillian superoperator which genuinely incorporates the effects of quantum jumps and fluctuations. The latter play a prominent role in the experimental observation of EPs on a quantum level. The quantum EPs can be utilized, e.g., in quantum metrology and for engineering novel quantum systems with nontrivial transport properties.

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• 量子物理学・ナノサイエンス第312回セミナー

• 量子物理学・ナノサイエンス先端研究センター 主催
• 東京工業大学理学院・物理学系 共催