STU-GTIIT光学论坛（No.53）

STU-GTIIT光学论坛（No.53）

报告地点：at lecture hall E508 in the North Campus of GTIIT

报告时间：2025年11月4日 17:00

报告题目: Spontaneous Emission Phenomena studied by the Complex Scaling Method of Nonhermitian Quantum Mechanics

报 告 人：Prof. Milan Šindelka(Chemistry Department, GTIIT)

报告摘要：

Spontaneous  emission (SE) is usually treated theoretically by employing the master  equation approach of quantum dissipation theory of open systems. In this  talk, another compelling viewpoint of SE will be highlighted. Namely,  the SE will be interpreted as decay of a Feshbach type resonance of  quantum scattering theory. Scattering resonances belong into the domain  of Nonhermitian Quantum Mechanics (NHQM), and their properties are often  studied by taking advantage of the Complex Scaling Method (CS). NHQM  formulation of the SE problem requires an adequate implementation of the  CS on momenta of the outgoing photons (emitted due to SE). The  underlying mathematical formulation will be sketched in the first part  of the presentation.

The  second part will focus on application of the above mentioned NHQM  formalism on the problem of a quantum harmonic oscillator coupled to an  electromagnetic bath in the dipole approximation. An analytic  nonperturbative NHQM solution of the corresponding SE problem will be  presented, based upon the concept of nonhermitian normal modes.

The  third part will futher extend the developed formalism on an intriguing  problem of SE from electronic autoionizing metastable states. A novel  NHQM approach will be presented, enabling an unified cohesive treatment of the SE phenomenon competing with the ionization phenomenon.

欢迎全校师生参加！

理学院

  2025年11月3日