Excitations in a Bose-condensed Liquid

Excitations in a Bose-condensed Liquid
Author :
Publisher : Cambridge University Press
Total Pages : 322
Release :
ISBN-10 : 9780521432719
ISBN-13 : 0521432715
Rating : 4/5 (715 Downloads)

Book Synopsis Excitations in a Bose-condensed Liquid by : Allan Griffin

Download or read book Excitations in a Bose-condensed Liquid written by Allan Griffin and published by Cambridge University Press. This book was released on 1993-08-19 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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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