Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components
Collective modes are studied in superfluid helium when the normal and superfluid components have a relative velocity w. In this paper the general dispersion relation for first and second sound modes is obtained for arbitrary values of w, and we have found the relationship between the amplitudes of...
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| Дата: | 2008 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2008
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| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/116916 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components / I.N. Adamenko, K.E. Nemchenko, V.A. Slipko, A.F.G. Wyatt // Физика низких температур. — 2008. — Т. 34, № 4-5. — С. 357–366. — Бібліогр.: 17 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1169162017-05-19T03:02:27Z Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components Adamenko, I.N. Nemchenko, K.E. Slipko, V.A. Wyatt, A.F.G. Жидкий гелий Collective modes are studied in superfluid helium when the normal and superfluid components have a relative velocity w. In this paper the general dispersion relation for first and second sound modes is obtained for arbitrary values of w, and we have found the relationship between the amplitudes of the oscillating variables for first sound. It is shown in a first sound wave, that both temperature and pressure can oscillate, and moreover, the normal fluid velocity can exceed the superfluid velocity in the wave. In the general case of first sound, the normal fluid not only has a velocity component parallel to the wave vector, but also a transverse velocity component. It is shown that when there is only a phonon system in the helium, the amplitude of the temperature oscillation in a first sound wave in an anisotropic phonon system, can exceed that in a second sound wave in an isotropic phonon system, for similar values of the normal fluid density. 2008 Article Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components / I.N. Adamenko, K.E. Nemchenko, V.A. Slipko, A.F.G. Wyatt // Физика низких температур. — 2008. — Т. 34, № 4-5. — С. 357–366. — Бібліогр.: 17 назв. — англ. 0132-6414 PACS: 67.25.D–;67.25.dt http://dspace.nbuv.gov.ua/handle/123456789/116916 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Жидкий гелий Жидкий гелий |
| spellingShingle |
Жидкий гелий Жидкий гелий Adamenko, I.N. Nemchenko, K.E. Slipko, V.A. Wyatt, A.F.G. Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components Физика низких температур |
| description |
Collective modes are studied in superfluid helium when the normal and superfluid components have a
relative velocity w. In this paper the general dispersion relation for first and second sound modes is obtained
for arbitrary values of w, and we have found the relationship between the amplitudes of the oscillating variables
for first sound. It is shown in a first sound wave, that both temperature and pressure can oscillate, and
moreover, the normal fluid velocity can exceed the superfluid velocity in the wave. In the general case of
first sound, the normal fluid not only has a velocity component parallel to the wave vector, but also a transverse
velocity component. It is shown that when there is only a phonon system in the helium, the amplitude
of the temperature oscillation in a first sound wave in an anisotropic phonon system, can exceed that in a second
sound wave in an isotropic phonon system, for similar values of the normal fluid density. |
| format |
Article |
| 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. |
| author_sort |
Adamenko, I.N. |
| title |
Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components |
| title_short |
Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components |
| title_full |
Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components |
| title_fullStr |
Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components |
| title_full_unstemmed |
Collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components |
| title_sort |
collective modes in superfluid helium when there is a relative velocity between the normal and superfluid components |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2008 |
| topic_facet |
Жидкий гелий |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/116916 |
| citation_txt |
Collective modes in superfluid helium when there is
a relative velocity between the normal and superfluid
components / I.N. Adamenko, K.E. Nemchenko, V.A. Slipko, A.F.G. Wyatt // Физика низких температур. — 2008. — Т. 34, № 4-5. — С. 357–366. — Бібліогр.: 17 назв. — англ. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT adamenkoin collectivemodesinsuperfluidheliumwhenthereisarelativevelocitybetweenthenormalandsuperfluidcomponents AT nemchenkoke collectivemodesinsuperfluidheliumwhenthereisarelativevelocitybetweenthenormalandsuperfluidcomponents AT slipkova collectivemodesinsuperfluidheliumwhenthereisarelativevelocitybetweenthenormalandsuperfluidcomponents AT wyattafg collectivemodesinsuperfluidheliumwhenthereisarelativevelocitybetweenthenormalandsuperfluidcomponents |
| first_indexed |
2023-10-18T20:28:35Z |
| last_indexed |
2023-10-18T20:28:35Z |
| _version_ |
1796150299003453440 |