Dispersion Equation and Level Density of Rotons in Liquid He II
スポンサーリンク
概要
- 論文の詳細を見る
On the basis of the collective description given in previous papers, the level densities of the excitations in liquid He II are computed for wave numbers in the roton region, by using the one-roton Green's function obtained for interactions with phonons and roton pairs. The sharp peak obtained for the observed excitation energy corresponds to the one-phonon peak observed by the neutron scattering experiment. Besides this, one or more broad peaks appear to show the importance of the multiple phonon scattering.
- 理論物理学刊行会の論文
- 1973-09-25
著者
-
NISHIYAMA Toshiyuki
Department of Physics, College of General Education Osaka University
-
NISHIYAMA Toshiyuki
Department of Physics and Applied Mathematics Osaka Institute of Technology
関連論文
- Inelastic Scattering of Negative Pions on C^ under Distorted Wave Impulse Approximation
- The Concave Nature of the Energy Spectrum of Liquid _4He at Very Low-Wave Numbers
- Pair Theory for Individual Particles in Liquid Helium II
- Momentum Distribution and Ground-State Energy of Liquid ^4He at the Absolute Zero Temperature
- Use of a Coherent-State Representation for a Many-Boson System at High Density
- A Long-Range Attractive Interaction of Rotons in Superfluid ^4He
- Collective Variable Approach to Many-Boson Systems at High Density
- Momentum Distribution of a Charged Bose Gas at High Density
- An Algebraic Theory of the Density Matrix, II
- Momentum Distribution of an Interacting Many-Boson System at High Density
- Condensate Fraction of a Charged Bose Gas at High Density : Condensed Matter and Statistical Physics
- An Algebraic Theory of the Density Matrix, I
- Equivalent Hamiltonian of an Electron Gas at High Density
- State Vectors in the Collective Description
- Theory of Sound Waves and collective Description
- Dispersion Equation and Level Density of Rotons in Liquid He II
- Microscopic Theory of the Energy Spectrum of Liquid Helium
- Method of Collective Description of the Excitations in Liquid Helium
- Momentum Distribution of an Interacting Many-Boson System
- Ground-State Energy of a Many-Boson System : Density and Phase Operator Approach
- Note On Many Fermion Problems
- A Quantum Theory of Boson Assemblies, II : A Classical Approach to Many-Boson Problems