The Effect of Roton Backflow on Quantum Evaporation from Superfluid 4He

被引：0

作者：

M. B. Sobnack

J. R. Matthias

J. C. H. Fung

机构：

[1] Loughborough University,Department of Physics

[2] University of Exeter,School of Physics

[3] The Hong Kong University of Science and Technology,Department of Mathematics

来源：

Journal of Low Temperature Physics | 2000年 / 121卷

关键词：

Evaporation; Free Surface; Magnetic Material; Scatter Process; Surface Scatter;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We investigate the effect of roton backflow on the scattering of atoms, rotons and phonons at the free surface of superfluid 4He at T=0 K by including backflow semi-phenomenologically in the form of a backflow potential in the theory of Sobnack et al. [M. B. Sobnack, J. C. Inkson, and J. C. H. Fung, Phys. Rev. B 60, 3465 (1999)]. We assume that all the surface scattering processes are elastic and that the quasiparticles and atoms are incident obliquely to the free surface. We calculate probabilities for the various one-to-one surface scattering processes allowed for a range of energies and compare the scattering rates with those obtained when backflow is neglected.

引用

页码：339 / 344

页数：5

共 21 条

[1]

Sobnack M.B.(1999)undefined Phys. Rev. B 60 3465-undefined

[2]

Inkson J.C.(1958)undefined Sou. Phys. JETP 7 289-undefined

[3]

Fung J.C.H.(1995)undefined Phys. Rev. Lett. 75 2510-undefined

[4]

Beliaev S.T.(2000)undefined Physica B 284 156-undefined

[5]

Dalfovo F.(1956)undefined Phys. Rev. 102 1189-undefined

[6]

Fracchetti A.(1954)undefined Phys. Rev. 94 262-undefined

[7]

Lastri A.(1976)undefined J. Low. Temp. Phys. 25 677-undefined

[8]

Pitaevskii L.(1947)undefined J. Phys. (USSR) 11 23-undefined

[9]

Stringari S.(1957)undefined Phys. Rev. 106 1117-undefined

[10]

Sobnack M.B.(undefined)undefined undefined undefined undefined-undefined

← 1 2 3 →