Evaluation of specific heat for superfluid helium between 0 - 2.1 K based on nonlinear theory

Sasaki, Shosuke

Journal of Physics: Conference Series, 2009, 150(3), 32091

アクセス数:297件（2025-04-21 03:37 集計）

固定URL: https://hdl.handle.net/11094/27141

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タイトル
Evaluation of specific heat for superfluid helium between 0 - 2.1 K based on nonlinear theory
著者
NRID
1000060029717 1000060029717
著者名
Sasaki, Shosuke
内容
25th International Conference on Low Temperature Physics (LT25)
抄録
The specific heat of liquid helium was calculated theoretically in the Landau theory [1]. The results deviate from experimental data in the temperature region of 1.3 - 2.1 K. Many theorists subsequently improved the results of the Landau theory by applying temperature dependence of the elementary excitation energy [2], [3]. As well known, many-body system has a total energy of Galilean covariant form. Therefore, the total energy of liquid helium has a nonlinear form for the number distribution function. The function form can be determined using the excitation energy at zero temperature and the latent heat per helium atom at zero temperature. The nonlinear form produces new temperature dependence for the excitation energy from Bose condensate. We evaluate the specific heat using iteration method. The calculation results of the second iteration show good agreement with the experimental data in the temperature region of 0 - 2.1 K, where we have only used the elementary excitation energy at 1.1 K.
出版者
IOP Publishing
収録物名
Journal of Physics: Conference Series
巻(号)
150(3)
ページ
32091
刊行年月
2009
言語
英語
ハンドルURL
https://hdl.handle.net/11094/27141
PISSN
17426588
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1088/1742-6596/150/3/032091
アクセス権
open access
権利情報
Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. CC-BY Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
http://creativecommons.org/licenses/by/3.0/
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article