A Note on the Calculation of the Long-Wavelength Limit of the Bosonic Excitation Spectrum

被引：2

作者：

Rovenchak, Andrij ^{[1
]}

机构：

[1] Ivan Franko Natl Univ Lviv, Dept Theoret Phys, 12 Drahomanov St, UA-79005 Lvov, Ukraine

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 2015年 / 70卷 / 01期

关键词：

Bose-System; Excitation Spectrum; Liquid Helium-4; Nuclear Matter; Yukawa Bose Liquid; BOSE-EINSTEIN CONDENSATION; ENERGY-SPECTRUM; LIQUID-HELIUM; NUCLEAR-MATTER; WAVE-FUNCTION; GROUND-STATE; SYSTEM; FLUIDS; SUPERFLUIDITY; PARTICLES;

D O I：

10.1515/zna-2014-0211

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An approach is proposed to analyse an interacting bosonic system using two-time temperature Green's functions on the collective variables. Two systems are studied: liquid helium-4 and the Yukawa Bose liquid being a model of the nuclear matter. The suggested decoupling in the equations of motion for Green's functions yields a good description of the elementary excitation spectrum in the long-wavelength limit.

引用

页码：73 / 78

页数：6

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