This book contains peer-reviewed contributions based on talks presented at the 25th International Workshop on Quantum Systems in Chemistry, Physics, and Biology held in Toru, Poland, in June 2022. The book reviews significant advances in concepts, methods, and applications of quantum systems in a broad variety of areas in modern chemistry, physics, and biology. In particular, it discusses atomic, molecular, and solid state structure, dynamics and spectroscopy, relativistic and correlation effects in quantum chemistry, topics of computational chemistry, physics, and biology, as well as applications of theoretical chemistry and physics in advanced molecular and nano-materials and biochemical systems. This book is aimed at advanced graduate students, academics, and researchers, both in university and corporation laboratories, interested in state of the art and novel trends in quantum chemistry, physics, and biology, and their applications.

Reviews important concepts and methods of quantum systems Presents applications of theoretical chemistry and physics in advanced systems Includes contributions from leading experts in the field

Autorentext
Ireneusz Grabowski - professor of physical sciences, specializes in theoretical physics and quantum chemistry. Director of the Institute of Physics of the Faculty of Physics, Astronomy Informatics at the Nicolaus Copernicus University (NCU) in Torun, Poland. He graduated from NCU (MSc in computer physics). In 1999 he received a Ph.D. degree in theoretical physics and in 2009 he obtained a habilitation. His research interests include describing the electron correlation effects in many-electron systems, many-body perturbation theory, coupled cluster method, density functional theory (DFT), orbital-dependent exchange-correlation functionals and OEP methods in DFT, non-covalent interactions, and numerical methods in quantum chemistry and physics. His work focuses on developing new computational methods for correctly and effectively describing the electron correlation in the electronic structure of atoms, molecules, and solids. Since 1992 he has worked at the NCU in Torun. In the meantime, he was also working as a postdoc and visiting professor in Quantum Theory Project, the University of Florida, USA, Istituto Nanoscienze-CNR, NNL-Lecce & Center for Biomolecular Nanotechnologies @UNILE, Italian Institute of Technology, Lecce, Italy, UPMC Sorbonne Universités, Paris, and Lehrstuhl für Theoretische Chemie, Universität Erlangen-Nürnberg, Erlangen, Germany.
Karolina Slowik is an associate professor at the Institute of Physics, Nicolaus Copernicus University in Torun, Poland, where she obtained her PhD in physical sciences in 2012. She spent her postdoctoral years in Germany at the Friedrich Schiller University in Jena and the Karlsruhe Institute of Technology, which both are excellent centers for photonics. Her background covers the quantum theory of light-matter interactions in various aspects, from quantum nanophotonics to optically dressed atomic media to optical properties of low-dimensional structures and materials.

Jean Maruani, born on December 28, 1937, in Tunis to a middle-class Sephardic family, pursued versatile studies in Paris, obtaining a Doctorat ès-Sciences Physiques at Sorbonne in 1966 under the supervision of Pr Roland Lefebvre. After collaborating with institutions like the CEA, Pasteur Institute, and LCIE, he spent two years in Charles McDowell's group at UBC in Vancouver. In 1968, he secured a permanent position at CMOA of CNRS, directed by Pr Raymond Daudel. Jean Maruani, a prolific researcher, has authored around 150 papers on the Structure and Dynamics of Molecular Systems, particularly in Magnetic Resonance and Photoelectron Spectroscopy. His contributions include solving pending problems in these fields, introducing novel concepts for non-rigid and approximate symmetries, and delving into Dirac electron properties and a quantum theory of biological evolution. He has co-organized about 30 scientific meetings, co-edited about 50 volumes, and founded a scientific journal and book series. He has also created the CMOA Prize and Medal, respectively, for junior and senior scientists. In spite of retirement in 2005, he remains very active, organizing annual QSCP meetings around the world. Jean Maruani is honoured with a Doctorate Honoris Causa from the University of Sofia, a Golden Medal from the City of Paris, and titles like Chevalier des Palmes Académiques and Corresponding Member of the European Academy. He also engages in classical singing and philosophical talks. He married composer Marja Rantanen in 1969, and they have three children and six grandchildren.

Erkki Brändas is a quantum chemist and graduate from the Faculty of Science at Uppsala University, Sweden, and Professor Emeritus at the Department of Chemistry, Uppsala University, Sweden. He has served as Visiting Professor at the University of Florida, USA, Technion, Israel, and TU, Darmstadt, Germany. His research concerns theoretical chemical physics from atoms and molecules to com

Inhalt
Part I. General Theory.- Landauer's Principle and Thermodynamics.- On the Majorana Solution to the Thomas-Fermi Equation.- Spherically Averaged Densities as Basic DFT Variables.- Linear-Expansion Shooting Techniques Based on Minimization of Intra-Iteration Errors.- Part II. Atomic Systems.- Erfonium: A Hooke Atom with Soft Interaction Potential.- Spectroscopy of Radiative Decay Processes in Atomic Systems in a Black-body Radiation Field.- Relativistic Many-Body Perturbation Theory Approach to Computing Spectra of Complex Atomic Systems: Spectral Data for Ne-like Ions.- Relativistic Quantum Chemistry and Spectroscopy of Pionic Atomic Systems: Hyperfine Structure.- Part III. Molecular Systems.- Low-Cost Generation of Optimal Molecular Orbitals for Multi-Reference CI Expansion: Natural Orbitals versus Renyi Entropy-Minimized Orbitals Provided by the Density-Matrix Renormalization Group.- Formally Exact Many-Body Perturbation Theory with Optimized Zeroth Approximation in Calculations of Spectral Parameters of Diatomic Molecules.- Complexes of Counterion-Trapped Molecules: Extreme Polarity, Rich IR-Activity, and Internal-Field Moderated Transformations.- Designing an Iron-Based Bis(pyridyl)borate Complex Catalyst for Ammonia-Borane Dehydrogenation using Density Functional Theory.- Theoretical Investigation of Cl2, ClO and Cl2O Molecules.- Part IV. Biochemistry and Biophysics.- An Improved Fragmentation Modeling Aminoacids Under Ionizing Radiation. I. Threonine.- Computational Investigation of the Influence of the Acyl Group on the Reducing Abilities of Acylphloroglucinols.- Integrated in-Silico Drug Modeling for Viral Proteins.