Roton Spectrum of Condensed Bose Systems
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概要
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The study of the behaviors of the roton excitation in a Bose system is performedon the basis of Bogoliubov's procedure. The method of the present theory isa generalization of Bohm-Pines' theory of electron gases to a quantum field theory.Rotons in our model are connected with the quasi-particles described by thetranslational motion in the condensate wavefunction, thus they are viewed justlike as solitons in a nonlinear field theory. We will show thxt the roton-momentumP. is intimately linked to the vortical motion in the system. The rest energy ofroton is also obtained.
- 社団法人日本物理学会の論文
- 1979-05-15
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