Acronym: QOART - Quantum Optics and Related Topics Dates: Wednesday, September 2, 2026 Web page: Online seminar on Quantum Optics and Related Topics Registration deadline: Tuesday, September 1, 2026 Submission deadline: Tuesday, September 1, 2026 Dear colleagues, We are pleased to announce the next online seminar on QOART (Quantum optics and related topics)! Title of the talk: Mathematical foundations, modeling methods, and applications of high-dimensional open quantum systems Speaker: Hui-hui Miao Abstract: This work is devoted to the development of mathematical models and efficient computational methods for simulating the quantum dynamics of chemical reactions involving hydrogen based on finite-dimensional models of quantum electrodynamics. A set of methods for the efficient numerical solution of the Lindblad equation in high-dimensional open quantum systems is proposed: Hilbert space reduction, the point-row-column method, and block diagonalization. Based on a modified Tavis-Cummings-Hubbard model, a model of association-dissociation of a neutral hydrogen molecule is constructed, taking into account spin degrees of freedom. A simplified scalable model of hydrogen bonds in water molecule clusters is constructed based on a Lambda-shaped three-level system, for which dark states are identified. The dynamics of quantum correlations (von Neumann entropy and quantum discord) in multi-qubit systems is studied. This study is of great importance for mathematical modeling of multidimensional open quantum systems and studying the characteristics of quantum chemical models. Date and Time: 2 September 2026, 4:00 PM (Moscow Time) Duration: 30–90 minutes Language: The presentation will be delivered in English. Link to join the seminar: https://mian.ktalk.ru/cyi5u831v1cs?pinCode=6468 QOART Seminar: https://sites.google.com/view/qoart/seminar Best regards, Ranjit +7 909 680 67 87 https://www.mathnet.ru/eng/person86793 QOART Telegram Channel: https://t.me/+i6rnhM_Wp1YwY2Ji Optical ‘Cat-like’ State: https://www.mathnet.ru/eng/present47506 QOART 2026 Conference: https://sites.google.com/view/qoart/2026 QOART Seminar: https://sites.google.com/view/qoart/seminar