Introduction to Surface and Superlattice Excitations, Second Edition, Cottam, M.G.
Автор: Glyde, Henry (Professor, Department of Physics and Название: Excitations in Liquid and Solid Helium ISBN: 0198510098 ISBN-13(EAN): 9780198510093 Издательство: Oxford Academ Рейтинг: Цена: 12490 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Presents an integrated theory of the characterizing phonon, roton, paramagnons, density, spin density excitations in quantum systems and how these are observed in neutron scattering measurements. The common features of liquid 4He, liquid 3He and solid helium are emphasized.
Описание: The purpose of this book is to review the current state of this quickly developing field. Up until now, there has been no concise review available of the rather diverse aspects of this field. This book gives a basic introduction to the concepts behind Bloch oscillations. It describes how the physics of high field transport has been investigated through a broad range of experimental techniques such as interband and intraband optical spectroscopy and transport experiments. Possible applications and further trends are also discussed.
Автор: Allan Griffin Название: Excitations in a Bose-condensed Liquid ISBN: 0521019982 ISBN-13(EAN): 9780521019989 Издательство: Cambridge Academ Рейтинг: Цена: 4266 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This volume gives an up-to-date, systematic account of the microscopic theory of Bose-condensed fluids developed since the late 1950s. In contrast to the usual phenomenological discussions of superfluid 4He, the present treatment is built on the pivotal role of the Bose broken symmetry and a Bose condensate. The many-body formalism is developed, with emphasis on the one- and two-particle Green’s functions and their relation to the density response function. These are all coupled together by the Bose broken symmetry, which provides the basis for understanding the elementary excitations and response functions in the hydrodynamic and collisionless regions. It also explains the difference between excitations in the superfluid and normal phases. Chapter 4 gives the first critical assessment of the experimental evidence for a Bose condensate in liquid 4He, based on high-momentum neutron scattering data.
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