Solidons and rotons in liquid helium
نویسندگان
چکیده
منابع مشابه
Phonons, rotons, and layer modes of liquid 4He in aerogel
We report the first observation of two-dimensional layer modes in both fully filled and partially filled aerogel. Using complementary high-energy resolution and high statistical precision neutron scattering instruments, and two different 87% porous aerogel samples, we show that the three-dimensional (3D) phonon-roton excitation energies and lifetimes of liquid 4He in aerogel are the same as in ...
متن کاملComment on "Dynamics of the interactions of rotons with quantized vortices in helium II"
Samuels and Donnelly, [1] in a recent Letter, have successfully applied the unusual kinematics of rotons to an analysis of roton-vortex scattering and mutual friction in He II. We applaud this success, which uses an approach we have advocated in an earlier publication. [2] Our purpose, in the present note, is to point out that the authors have made an unnecessary approximation in analyzing roto...
متن کاملVortex Photography in Liquid Helium
The study of quantized vortex lines has been advanced hy the technique of vortex photography. This paper prov~dex an overview of the information which has been acquired thus far from this method. Stationary cortex states are ohser\ed which are very similar to those predicted from theory. In addition types of dynamical phenomena are observed. such a\ collective oscillations and the acceleration ...
متن کاملQuantum cavitation in liquid helium.
Using a functional-integral approach, we have determined the temperature below which cavitation in liquid helium is driven by thermally assisted quantum tunneling. For both helium isotopes, we have obtained the crossover temperature in the whole range of allowed negative pressures. Our results are compatible with recent experimental results on He. 64.60.Qb, 64.60.My, 67.80.Gb Typeset using REVT...
متن کاملCosmological experiments in liquid helium
Fast passage through a continuous phase transition is expected to result in the creation of topical defects via the Kibble mechanism. Recent experiments involving the expansion of a small volume of liquid He through the lambda (superfluid) transition, as a model of the GUT (grand unified theory) symmetrybreaking transition of the early universe, are discussed and set in context. Copious creatio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal de Physique Lettres
سال: 1979
ISSN: 0302-072X
DOI: 10.1051/jphyslet:019790040018049300