Quantum diffusion-Reference-Cited by-同舟云学术

Quantum diffusion

Published:2004-01-01 Issue:3 Volume:2 Page:
ISSN:2391-5471
Container-title:Open Physics
language:
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Author:

Pushkarov Dimitar

Abstract

AbstractBasic ideas and results which characterize quantum diffusion of defects in quantum crystals like solid helium as a new phenomenon are presented. Quantum effects in such media lead to a delocalization of point defects (vacancies, impurities etc.) and they turn into quasiparticles of a new type—defectons, which are characterized not by their position in the crystal lattice but by their quasimomentum and dispersion law. Defecton-defecton and defecton-phonon scattering are considered and an interpolation formula for the diffusion coefficient valid in all interesting temperature and concentration regions is presented. A comparison with the experimental data is made. Some alternative points of view are discussed in detail and the inconsistency of the Kisvarsanyi-Sullivan theory is shown.

Publisher

Walter de Gruyter GmbH

Subject

General Physics and Astronomy

Link

http://link.springer.com/content/pdf/10.2478/BF02476424.pdf

Reference57 articles.

1. D.I. Pushkarov: “Microscopic Quantum Theory of Defects at Low Temperatures”, Zh. Eksp. Teor. Fiz., Vol. 59, (1970), pp. 1755–1764; Sov. Phys. JETP, Vol. 32, (1971), pp. 954–958.

2. D.I. Pushkarov: Quasiparticle Theory of Defectons in Solids, World Scientific, Singapore-New Jersey-London-Hong Kong, 1990.

3. D.I. Pushkarov: Defektony v kristallah; metod kvazichastic v kvantovoj teorii defektov, Nauka, Moscow, (1993), (in Russian).

4. D.I. Pushkarov: “Defecton Kinetics in Quantum Crystals”, Fiz. Nizk. Temp., Vol.1, (1975), pp.586–589; Sov. J. Low. Temp. Phys., Vol. 1, (1975), pp. 283–285.

5. A.E. Meierovich: “Internal friction in solid helium”, Zh. Eksp. Teor. Fiz., Vol. 67, No. 2(8), (1974), pp. 744–755.

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