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Application Of Density Matrix Theory To Dynamical Problems In The Nuclear Magnetic Resonance Of I12 Spin Systems Displaying Orientational Anisotropy
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Book Synopsis Application of Density Matrix Theory to Dynamical Problems in the Nuclear Magnetic Resonance of I>12 Spin Systems Displaying Orientational Anisotropy by : Timothy R. J. Dinesen
Download or read book Application of Density Matrix Theory to Dynamical Problems in the Nuclear Magnetic Resonance of I>12 Spin Systems Displaying Orientational Anisotropy written by Timothy R. J. Dinesen and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "La theorie de la matrice de densite est utilisee pour obtenir une representation theoretique de la Resonance Magnetique Nucleaire (RMN) effectuee sur deux systemes differents, les deux menant a dence de "l'anisotropy orientational". Le premier cas examine la "Multiple Quantum Filtered" (MQF) ligne en forme de $ sp{23}$Na (I = 3/2) tel qu'observe recemment dans certains tissus biologiques. On peut remenquer la relaxation en utilisant la theorie de Redfield. La production de la contribution d'un tenseur de deuxieme ranq a la forme de la ligne est demontee etre directment attributable a la presence d'une constante de copulation quadrupole electrique qui ne disparant pas. Les equations des mouvements derivees pour I = 3/2 peuvent etre appliquees a une sequence general de pouls et une solution specifiques pour l'experience DQF est discutee. Le deuxieme cas recherche le signal reponse de o-D$ sb2$ (avec impulsion angulaire rotationalle J = 0 et le spin angulaire I = 2) et p-D$ sb2$ (avec J = 1 et I = 1) dans les experiences RMN consistant dans une sequence a deux pouls. L'amplitude prevue de l'echo solide pur les contributions de I = 1 et I = 2 est exprimee par une fraction molaire, les parametres du pouls, l'intervalle entre les deux pouls, le champs moyen dipolaire de la pair de spin et le champs non-homogene magnetique. Les proprietes de l'hydrogene solide sont discutees dans le contexte de l'experience de l'echo solide. Pour la fraction I = 2, les positions prevues pour les echos satellites sont determinees ainsi que l'impossibilite de les observer en D$ sb2$ solide est discutees en termes des granduers relative des constantes de copulation intramoleculaire et du champs non-homogene magnetique." --
Book Synopsis Application of Density Matrix Theory to Dynamical Problems in the Nuclear Magnetic Resonance of I>1/2 Spin Systems Displaying Orientational Anisotropy by : Timothy R. J. Dinesen
Download or read book Application of Density Matrix Theory to Dynamical Problems in the Nuclear Magnetic Resonance of I>1/2 Spin Systems Displaying Orientational Anisotropy written by Timothy R. J. Dinesen and published by . This book was released on 1996 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Density Matrix Theory and Applications by : Karl Blum
Download or read book Density Matrix Theory and Applications written by Karl Blum and published by Springer. This book was released on 1981-08 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum mechanics has been mostly concerned with those states of systems that are represented by state vectors. In many cases, however, the system of interest is incompletely determined; for example, it may have no more than a certain probability of being in the precisely defined dynamical state characterized by a state vector. Because of this incomplete knowledge, a need for statistical averaging arises in the same sense as in classical physics. The density matrix was introduced by J. von Neumann in 1927 to describe statistical concepts in quantum mechanics. The main virtue of the density matrix is its analytical power in the construction of general formulas and in the proof of general theorems. The evaluation of averages and probabilities of the physical quantities characterizing a given system is extremely cumbersome without the use of density matrix techniques. The representation of quantum mechanical states by density matrices enables the maximum information available on the system to be expressed in a compact manner and hence avoids the introduction of unnecessary vari ables. The use of density matrix methods also has the advantage of providing a uniform treatment of all quantum mechanical states, whether they are completely or incom~'\etely known. Until recently the use of the density matrix method has been mainly restricted to statistical physics. In recent years, however, the application of the density matrix has been gaining more and more importance in many other fields of physics.
Book Synopsis Density Matrix Theory and Applications by :
Download or read book Density Matrix Theory and Applications written by and published by . This book was released on 2012-01-21 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Statics and Dynamics of Weakly Coupled Antiferromagnetic Spin-1/2 Ladders in a Magnetic Field by : Pierre Bouillot
Download or read book Statics and Dynamics of Weakly Coupled Antiferromagnetic Spin-1/2 Ladders in a Magnetic Field written by Pierre Bouillot and published by Springer. This book was released on 2015-01-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis shows how a combination of analytic and numerical techniques, such as a time dependent and finite temperature Density Matrix Renormalization Group (DMRG) technique, can be used to obtain the physical properties of low dimensional quantum magnets with an unprecedented level of accuracy. A comparison between the theory and experiment then enables these systems to be used as quantum simulators; for example, to test various generic properties of low dimensional systems such as Luttinger liquid physics, the paradigm of one dimensional interacting quantum systems. Application of these techniques to a material made of weakly coupled ladders (BPCB) allowed the first quantitative test of Luttinger liquids. In addition, other physical quantities (magnetization, specific heat etc.), and more remarkably the spins-spin correlations – directly measurable in neutron scattering experiments – were in excellent agreement with the observed quantities. We thus now have tools to quantitatiively assess the dynamics for this class of quantum systems.
Book Synopsis Static and Dynamic Properties of low dimensional Quantum Spin Systems by : Simon Nils Grossjohann
Download or read book Static and Dynamic Properties of low dimensional Quantum Spin Systems written by Simon Nils Grossjohann and published by Cuvillier Verlag. This book was released on 2010-08-17 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: In my thesis, static and dynamic properties of low-dimensional spin models were studied by means of a state of the art QMC method (SSE). As one among many numerical algorithms (e.g. DMRG, ED), the QMC proved to be a very flexible and high performance tool with access to dynamic correlation functions at finite temperatures and finite magnetic fields within the thermodynamic limit1. After detailed introduction of the QMC’s basic implementation, I provided yet unpublished information about the measurement of transverse (and longitudinal) imaginary time correlation functions for the spin S Heisenberg model. In addition to that, complications of the analytic continuation to the real axis were explained and two common Maximum Entropy algorithms (Bryan and Meshkov) introduced briefly. In my thesis, both algorithms have been implemented and contrasted in regard to their performance and quality of the continuation, clearly favoring Bryan’s method which is a standard least square algorithm based on Newton iterations with however highly optimized search directions in the multi-dimensional solution space.
Book Synopsis Solid State NMR Spectroscopy by : Melinda J. Duer
Download or read book Solid State NMR Spectroscopy written by Melinda J. Duer and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is for those familiar with solution-state NMR who are encountering solid-state NMR for the first time. It presents the current understanding and applications of solid-state NMR with a rigorous but readable approach, making it easy for someone who merely wishes to gain an overall impression of the subject without details. This dual requirement is met through careful construction of the material within each chapter. The book is divided into two parts: "Fundamentals" and "Further Applications." The section on Fundamentals contains relatively long chapters that deal with the basic theory and practice of solid-state NMR. The essential differences and extra scope of solid-state NMR over solution-state is dealt with in an introductory chapter. The basic techniques that all chapters rely on are collected into a second chapter to avoid unnecessary repetition later. Remaining chapters in the "Fundamentals" part deal with the major areas of solid-state NMR which all solid-state NMR spectroscopists should know about. Each begins with an overview of the topic that puts the chapter in context. The basic principles upon which the techniques in the chapter rely are explained in a separate section. Each of these chapters exemplifies the principles and techniques with the applications most commonly found in current practice. The "Further Applications" section contains a series of shorter chapters which describe the NMR techniques used in other, more specific areas. The basic principles upon which these techniques rely will be expounded only if not already in the Fundamentals part.
Book Synopsis Magnetic Resonance in Colloid and Interface Science by : J. Fraissard
Download or read book Magnetic Resonance in Colloid and Interface Science written by J. Fraissard and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic resonance techniques are especially interesting in the study of colloids and interfaces due to their unique ability to elucidate structure, dynamics and function at the atomic and molecular level. This book illustrates the most up to date applications of innovative NMR and EPR techniques, including magnetic resonance imaging and microscopy, to gas-solid and liquid-solid interfaces, organic and biological surfaces, microemulsions, liquid crystals, membranes, structure and dynamics of polymers and micellar systems, and diffusion in heterogeneous systems. A compendium of advanced NMR and EPR techniques and a state of the art description of the power of advanced new methodologies for the study of molecular dynamics and interfaces.
Book Synopsis Molecular Physics and Elements of Quantum Chemistry by : Hermann Haken
Download or read book Molecular Physics and Elements of Quantum Chemistry written by Hermann Haken and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook introduces the molecular and quantum chemistry needed to understand the physical properties of molecules and their chemical bonds. It follows the authors' earlier textbook "The Physics of Atoms and Quanta" and presents both experimental and theoretical fundamentals for students in physics and physical and theoretical chemistry. The new edition treats new developments in areas such as high-resolution two-photon spectroscopy, ultrashort pulse spectroscopy, photoelectron spectroscopy, optical investigation of single molecules in condensed phase, electroluminescence, and light-emitting diodes.
Download or read book Dynamic NMR Spectroscopy written by and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first successful NMR experiments in 1946 it was well appreciated that dynamic processes play an important role in the NMR spectroscopy of bulk matter [1]. Early theories on the dependence of the relaxation parameters Tl and T2 on the motions of nuclear spins were successful in explaining the dipolar broadening of the NMR signal in solids and the motional narrowing in liquids [2]. With the discovery of chemical shifts and spin-spin couplings another type of dynamical process affect ing the NMR line shape became apparent, the chemical exchange. As a consequence, dynamical NMR studies split into two groups differing not only in the dynamical topics but also in the method of investigation: physical studies of the motion of spins in liquids and solids by measurement of the relaxation times of single resonances and, on the other hand, chemical studies based on band shape analysis of NMR spectra recorded under steady state conditions. The two fields of research lost some of their basic differences with the development of the Fourier transform NMR method [3], which allows the measurement of relaxation times of different resonances at the same time, i. e. the study of differential motional behavior of different parts of mole cules, thus providing a new tool in conformational analyses. For example, informa tion can be obtained by this method on the relative importance of overall motions and internal motions [4].
Book Synopsis The Oxford Solid State Basics by : Steven H. Simon
Download or read book The Oxford Solid State Basics written by Steven H. Simon and published by Oxford University Press. This book was released on 2013-06-20 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a first undergraduate textbook in Solid State Physics or Condensed Matter Physics. While most textbooks on the subject are extremely dry, this book is written to be much more exciting, inspiring, and entertaining.
Book Synopsis Verified Synthesis of Zeolitic Materials by : H. Robson
Download or read book Verified Synthesis of Zeolitic Materials written by H. Robson and published by Gulf Professional Publishing. This book was released on 2001-06-26 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeolite synthesis is an active field of research. As long as this continues, new phases will be discovered and new techniques for preparing existing phases will appear. This edition of Verified Synthesis of Zeolitic Materials contains all the recipes from the first edition plus 24 new recipes. Five new introductory articles have been included plus those from the first edition, some of which have been substantially revised. The XRD patterns have been recorded using different instrument settings from those in the first edition and are intended to conform to typical X-ray diffraction practice. In most cases, only the XRD pattern for the productas synthesised is printed here. The exceptions are those phases which show marked changes in the XRD pattern upon calcination.
Book Synopsis Energy Dissipation in Molecular Systems by : André Tramer
Download or read book Energy Dissipation in Molecular Systems written by André Tramer and published by Springer Science & Business Media. This book was released on 2005-03-29 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Only a basic knowledge of quantum mechanics and spectroscopy is required of the reader and calculations are reduced to a strict minimum, making the book accessible to students."--Jacket.
Book Synopsis Chemical Applications of Atomic and Molecular Electrostatic Potentials by : Peter Politzer
Download or read book Chemical Applications of Atomic and Molecular Electrostatic Potentials written by Peter Politzer and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: On March 26-27, 1980, a symposium organized by one of us (P. P. ) was held at the l79th American Chemical Society National ~1eeting in Houston, Texas, under the sponsorship of the Theoretical Chemistry Subdivision of the Division of Physical Chemistry. The symposium was entitled "The Role of the Electrostatic Potential in Chemistry," and it served as a stimulus for this book. The original scope and coverage have been broadened, however; included here, in addition to contributions from the eleven invited symposium speakers and two of the poster-session participants, are four papers that were specially invited for this book. Furthermore, several authors have taken this opportunity to present at least partial reviews of the areas being discussed. Most of the manuscripts were completed in the late spring and early summer of 1980. We hope that this book will achieve two goals: First, we are trying to provide an overall picture, including recent advances, of current chemical research, both fundamental and applied, involving the electrostatic potential. Second, we want to convey an appreci ation of both the powers and also the limitations of the electro static potential approach. In order to achieve these goals, we have selected contributors whose research areas provide a very broad coverage of the field. Throughout the book, we have used a. u.
Book Synopsis NMR Studies of Translational Motion by : William S. Price
Download or read book NMR Studies of Translational Motion written by William S. Price and published by Cambridge University Press. This book was released on 2009-07-30 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overview of NMR theory and applications in fluid systems, fully referenced for research use.
Book Synopsis Solidification Processing of Metallic Alloys Under External Fields by : Dmitry G. Eskin
Download or read book Solidification Processing of Metallic Alloys Under External Fields written by Dmitry G. Eskin and published by Springer. This book was released on 2018-10-09 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the application of external physical fields to the solidification processing of metallic alloys. Leading academics from around the world present comprehensive and critical reviews on state-of-the-art research and discuss possible future directions. Major physical fields, including electromagnetic, electric, acoustic, and thermal, are considered. In addition, the most advanced synchrotron X-ray based real-time and in-situ studies and numerical modeling methodologies are reviewed and discussed, with a special emphasis on their applications to the solidification processes. Throughout, all chapters are illustrated with both historical and very recent research cases, including typical examples of in-situ studies, modeling, and simulation. This book contains essential knowledge and information suitable for a wide audience, from undergraduate and postgraduate students to academics, practicing researchers, and engineers in materials, metallurgy, and manufacturing.
Book Synopsis IUTAM Symposium on Physicochemical and Electromechanical, Interactions in Porous Media by : Jacques P. Huyghe
Download or read book IUTAM Symposium on Physicochemical and Electromechanical, Interactions in Porous Media written by Jacques P. Huyghe and published by Springer Science & Business Media. This book was released on 2005-10-18 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decades, new experimental and numerical techniques have taken many advanced features of porous media mechanics down to practical engineering applications. This happened in areas that sometimes were not even suspected to be open to engineering ideas at all. The challenge that often faces engineers in the field of geomechanics, biomechanics, rheology and materials science is the translation of ideas existing in one field to solutions in the other. The purpose of the IUTAM symposium from which this proceedings volume has been compiled was to dive deep into the mechanics of those porous media that involve mechanics and chemistry, mechanics and electromagnetism, mechanics and thermal fluctuations of mechanics and biology. The different sections have purposely not been formed according to field interest, but on the basis of the physics involved.
