The unusual properties of anisotropic systems of quasiparticles in superfluid 4He

Автор(и)

  • I.N. Adamenko V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61077, Ukraine
  • K.E. Nemchenko V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61077, Ukraine
  • V.A. Slipko V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61077, Ukraine
  • A.F.G. Wyatt School of Physics, University of Exeter, Exeter EX4 4QL, UK

DOI:

https://doi.org/10.1063/1.2780172

Ключові слова:

superfluid 4He, quasiparticle anisotropic systems, phonon, roton.

Анотація

We discuss a number of unusual phenomena, which have been discovered recently in anisotropic quasiparticle systems in superfluid 4He. These include the creation of high-energy phonons by a pulse of low-energy phonons, the suprathermal distribution of high-energy phonons in long phonon pulses, the mesa shape of the angular distribution of low-energy phonons, the creation of a «hot line» when two-phonon pulses cross. The thermodynamic properties of anisotropic quasiparticle systems of He II are derived for all degrees of anisotropy.

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Опубліковано

2007-08-10

Як цитувати

(1)
Adamenko, I.; Nemchenko, K.; Slipko, V.; Wyatt, A. The Unusual Properties of Anisotropic Systems of Quasiparticles in Superfluid 4He. Fiz. Nizk. Temp. 2007, 33, 1008-1015.

Номер

Том 33 № 9 (2007)

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