Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width
The evolution of a pulse of noninteracting quasiparticles, caused by their different velocities
 and angular distribution of momenta, is studied theoretically. Equations are found that describe
 the shape of the pulse surface at any time. The time of the beginning, end and duration o...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2004 |
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| Format: | Artikel |
| Sprache: | Englisch |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2004
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width / I.N. Adamenko, K.E. Nemchenko, V.A. Slipko, and A.F.G. Wyatt // Физика низких температур. — 2004. — Т. 30, № 6. — С. 579-589. — Бібліогр.: 20 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862551646308925440 |
|---|---|
| author | Adamenko, I.N. Nemchenko, K.E. Slipko, V.A. Wyatt, A.F.G. |
| author_facet | Adamenko, I.N. Nemchenko, K.E. Slipko, V.A. Wyatt, A.F.G. |
| citation_txt | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width / I.N. Adamenko, K.E. Nemchenko, V.A. Slipko, and A.F.G. Wyatt // Физика низких температур. — 2004. — Т. 30, № 6. — С. 579-589. — Бібліогр.: 20 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | The evolution of a pulse of noninteracting quasiparticles, caused by their different velocities
and angular distribution of momenta, is studied theoretically. Equations are found that describe
the shape of the pulse surface at any time. The time of the beginning, end and duration of the density
of the quasiparticle energy flux is determined at a general spatial point. The quasiparticle energy
density is considered at all times and positions, and it is shown that the region of high energy
density, in the middle of the pulse, is equal to the initial energy density under certain conditions.
These theoretical results are discussed in relation to experimental data on the evolution of a pulse
of noninteracting phonons in superfluid helium.
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| first_indexed | 2025-11-25T20:54:10Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-119730 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-25T20:54:10Z |
| publishDate | 2004 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Adamenko, I.N. Nemchenko, K.E. Slipko, V.A. Wyatt, A.F.G. 2017-06-08T08:32:57Z 2017-06-08T08:32:57Z 2004 Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width / I.N. Adamenko, K.E. Nemchenko, V.A. Slipko, and A.F.G. Wyatt // Физика низких температур. — 2004. — Т. 30, № 6. — С. 579-589. — Бібліогр.: 20 назв. — англ. 0132-6414 PACS: 67.40.Fd https://nasplib.isofts.kiev.ua/handle/123456789/119730 The evolution of a pulse of noninteracting quasiparticles, caused by their different velocities
 and angular distribution of momenta, is studied theoretically. Equations are found that describe
 the shape of the pulse surface at any time. The time of the beginning, end and duration of the density
 of the quasiparticle energy flux is determined at a general spatial point. The quasiparticle energy
 density is considered at all times and positions, and it is shown that the region of high energy
 density, in the middle of the pulse, is equal to the initial energy density under certain conditions.
 These theoretical results are discussed in relation to experimental data on the evolution of a pulse
 of noninteracting phonons in superfluid helium. We express our gratitude to EPSRC of the UK
 (grant GR/S24855 and GR/N20225), and to GFFI
 of Ukraine (grant N02.07/000372) for support for
 this work. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Квантовые жидкости и квантовые кpисталлы Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width Article published earlier |
| spellingShingle | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width Adamenko, I.N. Nemchenko, K.E. Slipko, V.A. Wyatt, A.F.G. Квантовые жидкости и квантовые кpисталлы |
| title | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width |
| title_full | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width |
| title_fullStr | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width |
| title_full_unstemmed | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width |
| title_short | Evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width |
| title_sort | evolution of a pulse of noninteracting quasiparticles with dispersion and initial angular width |
| topic | Квантовые жидкости и квантовые кpисталлы |
| topic_facet | Квантовые жидкости и квантовые кpисталлы |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/119730 |
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