Microscopical theory, structure of superfluid component and elementary excitation spectrum of the non-relativistic Bose-liquid ⁴He

• Datum: 2013
• Hauptverfasser: Pashitskij, E.A., Chumachenko, A.V., Vilchynskyi, S.I.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2013
• Schriftenreihe: Вопросы атомной науки и техники
• Schlagworte: Квантово-полевые и групповые подходы теоретической физики. Семинар памяти Петра Ивановича Фомина
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/111868
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Microscopical theory, structure of superfluid component and elementary excitation spectrum of the non-relativistic Bose-liquid ⁴He / E.A. Pashitskij, A.V. Chumachenko, S.I. Vilchynskyi // Вопросы атомной науки и техники. — 2013. — № 3. — С. 35-41. — Бібліогр.: 21 назв. — англ.

In frame of selfconsistent microscopical model of the superfluid non-relativistic Bose liquid ⁴He with suppressed due to many-particle effects single-particle condensate and intensive pair coherent condensate the ab initio calculation of the spectrum E(p), based on the realistic models for the pair interaction potentials V (r), which has a finite oscillating Fourier-component, was presented. It was shown that oscillating character of the renormalized Fourier component of the fitting "hard sphere" and "semitransparent sphere" pair interacting potentials leads to non-monotonic behavior for the momentum dependence of the renormalized mass operators and, as a consequence, to emerging of the roton minimum in the quasiparticles spectrum E(p), which exactly connected with the first largest negative minimum of the renormalized interaction Fourier-component of a pair of bosons.