دانلود کتاب مبانی الکترودینامیک کوانتومی مولکولی

The book begins with an account of how chemistry came about as a science and hit on a structural conception to account for the empirical facts of chemical reactions in terms of the spatial arrangement of atoms. Such an approach is to be contrasted with that of physics, which is founded on a mechanical description of natural phenomena. The basic unit of chemistry is the atom; however, not enough is known about their ‘interactions’ to formulate a ‘mathematical chemistry’ beyond stoichiometry, and so recourse has long been taken to subatomic structure in terms of electrons and nuclei. Such particles have the additional physical property of electric charge, and a combination of electrodynamics and quantum theory is unavoidable in a fundamental physical account. These two contrasting methodologies collided in the early twentieth century when physics advanced into what had hitherto been the province of the chemist. In the author’s opinion the resulting tension has never been resolved satisfactorily. An exploration of how that tension arises and where it persists seems a good enough reason to try to describe the ‘known knowns’ and the ‘known unknowns’ in this story. Although some of the principal features of quantum chemistry will feature, this is not another book about quantum chemistry, a subject for which there is already an extensive textbook, monograph and journal literature.