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Books > Science & Mathematics > Physics > Atomic & molecular physics
This volume continues the tradition of the Advances series. It
contains contributions from experts in the field of atomic,
molecular, and optical (AMO) physics. The articles contain some
review material, but are intended to provide a comprehensive
picture of recent important developments in AMO physics. Both
theoretical and experimental articles are included in the volume.
The dynamics of quantum systems exposed to ultrafast (at the femtosecond time-scale) and strong laser radiation has a highly non-linear character, leading to a number of new phenomena, outside the reach of traditional spectroscopy. The current laser technology makes feasible the probing and control of quantum-scale systems with fields that are as strong as the interatomic Coulombic interactions and time resolution that is equal to (or less than) typical atomic evolution times. It is indispensable that any theoretical description of the induced physical processes should rely on the accurate calculation of the atomic structure and a realistic model of the laser radiation as pulsed fields. This book aims to provide an elementary introduction of theoretical and computational methods and by no means is anywhere near to complete. The selection of the topics as well as the particular viewpoint is best suited for early-stage students and researchers; the included material belongs in the mainstream of theoretical approaches albeit using simpler language without sacrificing mathematical accuracy. Therefore, subjects such as the Hilbert vector-state, density-matrix operators, amplitude equations, Liouville equation, coherent laser radiation, free-electron laser, Dyson-chronological operator, subspace projection, perturbation theory, stochastic density-matrix equations, time-dependent SchrAdinger equation, partial-wave analysis, spherical-harmonics expansions, basis and grid wavefunction expansions, ionization, electron kinetic-energy and angular distributions are presented within the context of laser-atom quantum dynamics.
B Factories are particle colliders at which specific subatomic particles - B mesons - are produced abundantly. The purpose is to study the properties of their decays in great detail in order to shed light on a mystery of eminently larger scale: why do we live in a universe composed of anti-matter? This book introduces readers to the physics laws of the CP asymmetry, touching on experimental requirements needed to perform such measurements at the subatomic level, and illustrating the main findings of the contemporary B Factories.
Gas phase molecular spectroscopy is a powerful tool for obtaining
information on the geometry and internal structure of isolated
molecules as well as on the interactions that they undergo. It
enables the study of fundamental parameters and processes and is
also used for the sounding of gas media through optical techniques.
It has been facing always renewed challenges, due to the
considerable improvement of experimental techniques and the
increasing demand for accuracy and scope of remote sensing
applications.
Atomic Clusters: From Gas Phase to Deposited brings together a
series of chapters, prepared by acknowledged experts in their
fields. Both fundamental and practical aspects are addressed of the
physics and chemistry of a novel state of matter, namely clusters
of small numbers of atoms of nanometre dimensions. This is a field
of nanoscience that existed before the word was invented, but has
particularly achieved major advances in the recent years.
Volume 54 of the Advances Series contains ten contributions,
covering a diversity of subject areas in atomic, molecular and
optical physics. The article by Regal and Jin reviews the
properties of a Fermi degenerate gas of cold potassium atoms in the
crossover regime between the Bose-Einstein condensation of
molecules and the condensation of fermionic atom pairs. The
transition between the two regions can be probed by varying an
external magnetic field. Sherson, Julsgaard and Polzik explore the
manner in which light and atoms can be entangled, with applications
to quantum information processing and communication. They report on
the result of recent experiments involving the entanglement of
distant objects and quantum memory of light. Recent developments in
cold Rydberg atom physics are reviewed in the article by Choi,
Kaufmann, Cubel-Liebisch, Reinhard, and Raithel. Fascinating
experiments are described in which cold, highly excited atoms
(???Rydberg??? atoms) and cold plasmas are generated. Evidence for
a collective excitation of Rydberg matter is also presented.
Griffiin and Pindzola offer an account of non-perturbative quantal
methods for electron-atom scattering processes. Included in the
discussion are the R-matrix with pseudo-states method and the
time-dependent close-coupling method. An extensive review of the
R-matrix theory of atomic, molecular, and optical processes is
given by Burke, Noble, and Burke. They present a systematic
development of the R-matrix method and its applications to various
processes such as electron-atom scattering, atomic photoionization,
electron-molecule scattering, positron-atom scattering, and
atomic/molecular multiphoton processes. Electron impactexcitation
of rare-gas atoms from both their ground and metastable states is
discussed in the article by Boffard, Jung, Anderson, and Lin.
Excitation cross sections measured by the optical method are
reviewed with emphasis on the physical interpretation in terms of
electronic structure of the target atoms. Ozier and Moazzen-Ahmadi
explore internal rotation of symmetric top molecules. Developments
of new experimental methods based on high-resolution torsional,
vibrational, and molecular beam spectroscopy allow accurate
determination of internal barriers for these symmetric molecules.
The subject of attosecond and angstrom science is reviewed by
Niikura and Corkum. The underlying physical mechanisms allowing one
to generate attosecond radiation pulses are described and the
technology needed for the preparation of such pulses is discussed.
LeGou??t, Bretenaker, and Lorger?? describe how rare earth ions
embedded in crystals can be used for processing optically carried
broadband radio-frequency signals. Methods for reaching tens of
gigahertz instantaneous bandwidth with submegahertz resolution
using such devices are analyzed in detail and demonstrated
experimentally. Finally, in the article by Illing, Gauthier, and
Roy, it is shown that small perturbations applied to optical
systems can be used to suppress or control optical chaos,
spatio-temporal dynamics, and patterns. Applications of these
techniques to communications, laser stabilization, and improving
the sensitivity of low-light optical switches are explored.
This book deals with the practice of Optical Radiation Measurements
with introductory material to introduce the topics discussed. It
will be most useful for students, scientists and engineers working
in any academic, industrial or governmental projects related to
optical radiation. The book contains chapters that treat in detail
the procedures and techniques for the characterization of both
sources and detectors to the highest degree of accuracy and
reliability. It has a chapter devoted specifically to optical
measurements of laser sources and fiberoptics for communication and
a chapter devoted to uncertainty in measurement and its treatment
with real examples of optical measurements. The book contains
introductory materials that will allow a newcomer to radiometry to
develop the expertise to perform exacting and accurate measurement.
The authors stress the various causes of uncertainty in each phase
of a measurement and thus allow for users to arrive at a correct
assessment of their uncertainty of measurement in their particular
circumstance.
This is an overview of single molecule physics, the study of both equilibrium and non-equilibrium properties at the single molecule level. It begins with an introduction to this fascinating science and includes a chapter on how to build the most popular instrument for single molecule biophysics, the total internal reflection fluorescence (TIRF) microscope. It concludes with the Poisson process approach to statistical mechanics, explaining how to relate the process to diverse areas and see how data analysis and error bars are integral parts of science.
All living matter is comprised of cells; small compartments isolated from the environment by a cell membrane and filled with concentrated solutions of various organic and inorganic compounds. Some organisms are a single cell and all life functions are performed by that cell. Others have groups of cells, or entire organs, specializing in one particular function. The survival of the entire organism depends on all its cells and organs fulfilling their roles. The aim of this book is to investigate the basic physical phenomena occurring in cells. These physical transport processes facilitate chemical reactions in the cell and that, in turn, leads to the biological functions necessary for the cell to satisfy its role in the mother organism. Ultimately, the goal of every cell is to stay alive and to fulfil its function as a part of a larger organ or organism. This first volume is an inventory of physical transport processes occurring in cells, while the second volume will take a closer look at how complex biological and physiological cell phenomena result from these very basic physical processes.
Atomic Physics provides a concise treatment of atomic physics and a basis to prepare for work in other disciplines that are underpinned by atomic physics, such as chemistry, biology and several aspects of engineering science. The focus is mainly on atomic structure since this is what is primarily responsible for the physical properties of atoms. After a brief introduction to some basic concepts, the perturbation theory approach follows the hierarchy of interactions starting with the largest. The other interactions of spin, and angular momentum of the outermost electrons with each other, the nucleus and external magnetic fields are treated in order of descending strength. A spectroscopic perspective is generally taken by relating the observations of atomic radiation emitted or absorbed to the internal energy levels involved. X-ray spectra are then discussed in relation to the energy levels of the innermost electrons. Finally, a brief description is given of some modern, laser-based, spectroscopic methods for the high-resolution study of the details of atomic structure.
The Generator Coordinate Method (GCM) is a mathematical tool for
the understanding of stable atomic nuclei. Electronic, Atomic and
Molecular Calculations is designed to assist scientists applying
GCM in the analysis of the electronic structure of atoms and
molecules. There have been numerous publications covering nuclear
physics and electronic structure of atoms and molecules, but this
book is unique in the sense that it specifically addresses the
application of GCM for such purposes. Using this book, researchers
will be able to understand and calculate the electronic structure
in a novel manner.
This book addresses problems in three main developments in modern condensed matter physics- namely topological superconductivity, many-body localization and strongly interacting condensates/superfluids-by employing fruitful analogies from classical mechanics. This strategy has led to tangible results, firstly in superconducting nanowires: the density of states, a smoking gun for the long sought Majorana zero mode is calculated effortlessly by mapping the problem to a textbook-level classical point particle problem. Secondly, in localization theory even the simplest toy models that exhibit many-body localization are mathematically cumbersome and results rely on simulations that are limited by computational power. In this book an alternative viewpoint is developed by describing many-body localization in terms of quantum rotors that have incommensurate rotation frequencies, an exactly solvable system. Finally, the fluctuations in a strongly interacting Bose condensate and superfluid, a notoriously difficult system to analyze from first principles, are shown to mimic stochastic fluctuations of space-time due to quantum fields. This analogy not only allows for the computation of physical properties of the fluctuations in an elegant way, it sheds light on the nature of space-time. The book will be a valuable contribution for its unifying style that illuminates conceptually challenging developments in condensed matter physics and its use of elegant mathematical models in addition to producing new and concrete results.
This thesis presents the first lattice quantum chromodynamics (QCD) approach to the charmed baryon regime, building on the knowledge and experience gained with former lattice QCD applications to nucleon structure. The thesis provides valuable insights into the dynamics of yet unobserved charmed baryon systems. Most notably, it confirms that the expectations of model or effective field theoretical calculations of heavy-hadron systems hold qualitatively, while also demonstrating that they conflict with the quantitative results, pointing to a tension between these complementary approaches. Further, the book presents a cutting-edge approach to understanding the structure and dynamics of hadrons made of quarks and gluons using QCD, and successfully extends the approach to charmed hadrons. In particular, the thesis investigate a peculiar property of charmed hadrons whose dynamics, i.e., structure, deviates from their counterparts, e.g., those of protons and neutrons, by employing the lattice QCD approach -a state-of-the-art numerical method and the powerful ab initio, non-perturbative method.
This book originated out of a desire to combine topics on vibrational absorption, Raman scattering, vibrational circular dichroism (VCD) and Raman optical activity (VROA) into one source. The theoretical details of these processes are presented in ten different chapters. Using dispersive and Fourier transform techniques, the instrumentation involved in these spectral measurements are given in three chapters. Major emphasis is placed on the newer techniques, i.e. VCD and VROA, with the conventional vibrational absorption and vibrational Raman scattering methods incorporated as natural parts of the newer methods. Features of this book: Comprehensive coverage of vibrational circular dichroism and vibrational Raman optical activity. Coverage of theoretical and instrumental details. A comprehensive survey of VCD and VROA applications is included, so that the reader can get an overview of theory, instrumentation and applications in one source. The topics covered are of an advanced level, which makes this
book invaluable for graduate students and practising scientists in
vibrational spectroscopy. |
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