Quantum Hydrodynamics and Two-Fluid Dynamics
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概要
- 論文の詳細を見る
It is shown how two fluid dynamical equations for superfluid He^4 are derived from quantum hydrodynamical Hamiltonian, represented in terms of the quantized canonical conjugate variables, mass density ρ(x) and velocity field v(x). An essential assumption is that expectation value of v(x) should be identified with the superfluid velocity. The random phase approximation is applied to higher order dynamical correlation function of ρ and v appearing in the equations of motion. This approximation implies to decouple the correlation into the hydrodynamical degrees of freedom and the incoherent one of thermal phonon. It is found that a set of equations thus obtained is consistent with the two fluid dynamical one, having been widely used in the phenomenological theories.
- 理論物理学刊行会の論文
- 1977-04-25
著者
-
Miyake Kazumasa
Department Of Internal Medicine Division Of Gastroenterology Nippon Medical School
-
Yamada Kazuo
Department Of Architecture Faculty Of Engineering Aichi Institute Of Technoligy
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