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This book is written for graduate students just beginning research, for theorists curious about what experimentalists actually can and do measure, and for experimentalists bewildered by theory. It is a guide for potential users of spectroscopic data, and uses language and concepts that bridge the frequency-and time-domain spectroscopic communities. Key topics, concepts, and techniques include: the assignment of simple spectra, basic experimental techniques, definition of Born-Oppenheimer and angular momentum basis sets and the associated spectroscopic energy level patterns (Hund's

Diatomic molecules. --- Molecular spectroscopy. --- Perturbation (Quantum dynamics) --- Perturbation theory, Quantum mechanical --- Perturbation (Mathematics) --- Quantum theory --- Spectroscopy, Molecular --- Spectrum analysis --- Molecular spectra --- Molecules

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Providing a new perspective on quantum field theory, this book gives a pedagogical and up-to-date exposition of non-perturbative methods in relativistic quantum field theory and introduces the reader to modern research work in theoretical physics. It describes in detail non-perturbative methods in quantum field theory, and explores two- dimensional and four- dimensional gauge dynamics using those methods. The book concludes with a summary emphasizing the interplay between two- and four- dimensional gauge theories. Aimed at graduate students and researchers, this book covers topics from two-dimensional conformal symmetry, affine Lie algebras, solitons, integrable models, bosonization, and 't Hooft model, to four-dimensional conformal invariance, integrability, large N expansion, Skyrme model, monopoles and instantons. Applications, first to simple field theories and gauge dynamics in two dimensions, and then to gauge theories in four dimensions and quantum chromodynamics (QCD) in particular, are thoroughly described.

Field theory (Physics) --- Perturbation (Quantum dynamics) --- Champs, Théorie des (Physique) --- Perturbation (Mécanique quantique) --- Perturbation theory, Quantum mechanical --- Perturbation (Mathematics) --- Quantum theory --- Classical field theory --- Continuum physics --- Physics --- Continuum mechanics

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This book offers a look into the field of Quantum Mechanics with respect to orbital perturbations at the atomic level. It takes the approach of studying perturbations in a more simplified fashion. "Orbital Frontiers" deals with the common problems associated with the nature of atomic uncertainties and reactions. It is presented in a simple and readable format. This book is intended for non-theoreticians and graduate students.

Molecular orbitals. --- Reactivity (Chemistry) --- Perturbation (Quantum dynamics) --- Chemical reaction, Conditions and laws of --- Chemical reactions --- Orbitals, Molecular --- Chemical bonds --- Electrons --- Molecules --- Overlap integral --- Quantum chemistry --- Valence (Theoretical chemistry) --- Wave mechanics --- Perturbation theory, Quantum mechanical --- Perturbation (Mathematics) --- Quantum theory

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This volume describes the Pomeron, an object of crucial importance in very high energy particle physics. Starting with a general description of the Pomeron within the framework of Regge theory, the emergence of the Pomeron within scalar field theory is discussed, providing a natural foundation on which to develop the more realistic case of QCD. The reggeization of the gluon is demonstrated and used to build the Pomeron of perturbative QCD. The dynamical nature of the Pomeron and its role in small-x deep inelastic scattering and in diffractive scattering is also examined in detail. The volume concludes with a study of the colour dipole approach to high energy scattering and the explicit role of unitarity corrections. This book will be of interest to theoretical and experimental particle physicists, and applied mathematicians. First published in 1997, this title has been reissued as an Open Access publication on Cambridge Core.

Regge theory. --- Pomerons. --- Quantum chromodynamics. --- Perturbation (Quantum dynamics) --- Perturbation theory, Quantum mechanical --- Perturbation (Mathematics) --- Quantum theory --- Chromodynamics, Quantum --- QCD (Nuclear physics) --- Particles (Nuclear physics) --- Quantum electrodynamics --- Pomeranchuk particles --- Pomeranchuk poles --- Pomeranchuk trajectories --- Angular momentum (Nuclear physics)

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The motivation for this special-topic volume was two-fold. Among the various techniques for probing material properties at the atomic scale, PAC is a somewhat hidden gem. This is partly because PAC requires the use of radioisotopes; thus rendering it almost useless as a non-destructive characterization method. Moreover, there are relatively few PAC isotopes available; so it is not always possible to apply PAC to the most technologically pressing problems. Thus, PAC studies of materials are often more fundamental, and less applied, in nature. One of the goals of this volume was to raise the pro

Solids --- Diffusion. --- Angular correlations (Nuclear physics) --- Perturbation (Quantum dynamics) --- Perturbation theory, Quantum mechanical --- Perturbation (Mathematics) --- Quantum theory --- Nuclear reactions --- Pairing correlations (Nuclear physics) --- Angular distribution (Nuclear physics) --- Gases --- Liquids --- Physics --- Separation (Technology) --- Solution (Chemistry) --- Solutions, Solid --- Matter --- Packed towers --- Semiconductor doping --- Solid state physics --- Transparent solids --- Defects. --- Diffusion --- Properties