Friday 27 September 2024 |
Events for day: Wednesday 07 June 2017 |
11:00 - 12:00 Quantum information biweekly journal club Generalized Master Equations Leading to Completely Positive Dynamics School NANO SCIENCES Generalized Master Equations Leading to Completely Positive Dynamics We provide a general construction of quantum generalized master equations with a memory kernel leading to well-defined, that is, completely positive and trace-preserving, time evolutions. The approach builds on an operator generalization of memory kernels appearing in the description of non-Markovian classical processes and puts into evidence the nonuniqueness of the relationship arising due to the typical quantum issue of operator ordering. The approach provides a physical interpretation of the structure of the kernels, and its connection with the c ... 14:00 - 15:00 Combinatorics and Computing Weekly Seminar Geodesic spanners for points on a polyhedral terrain School MATHEMATICS ... 14:00 - 15:00 Weekly Seminar Condensed Matter and Statistical Physics Group Crystal structure search and electronic properties of alkali-doped Polycyclic aromatic hydrocarbons School PHYSICS Classroom A ... 14:00 - 15:00 Weekly Seminar Crystal structure search and electronic properties of alkali-doped Polycyclic aromatic hydrocarbons School NANO SCIENCES Crystal structure search and electronic properties of alkali-doped Polycyclic aromatic hydrocarbons Alkali-doped aromatic compounds have shown evidence of metallic and superconducting phases whose precise nature is still mysterious. In potassium and rubidium-doped phenanthrene, superconducting temperatures around 5 K have been detected, but such basic elements as the stoichiometry, crystal structure, and electronic bands are still speculative. We seek to predict the crystal structure of M3-phenanthrene and -picene (M = K, Rb) using ab initio evolutionary simulation in conjunction with density functional theory (DFT), and fin ... |