4He spectrum shift caused by 3He admixture II

D. Baranov and V. Yarunin

Physica A: Statistical Mechanics and its Applications, 2001, vol. 296, issue 3, 337-346

Abstract: The shift ΔE of a maxon–roton 4He excitation spectrum E via the 3He admixture is considered theoretically. The Bogoliubov formula for E(ρ,g) as a function of Bose-condensate density ρ and of 4He/4He interaction g is used as an element of partition function formalism of the whole system, presented in the form of a path (functional) integral. The dependence of ρ on g, 4He/3He interaction λ as well as on the pressure P, induced by the 3He admixture, is taken into account. The new model of g, suitable for analytical calculations, is used for a description of a change of P within a constant volume. The cases of positive and negative shifts are found as the result of competition between interactions g and λ.

Keywords: Bose–Einstein condensation; 4He⇌3He energy transfer; Pressure; Spectrum of noncondensate excitations (search for similar items in EconPapers)
Date: 2001
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378437101001741
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:296:y:2001:i:3:p:337-346

DOI: 10.1016/S0378-4371(01)00174-1

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().