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Excitation spectrum and virial coefficients of superfluid He 4
Author(s) -
Bahadur R.,
Bhardwaj N.,
Kachhava C. M.
Publication year - 1986
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221340226
Subject(s) - excitation , superfluidity , formalism (music) , atomic physics , physics , quantum mechanics , art , musical , visual arts
A correlation between the equation of state and the excitation spectrum, of superfluid He 4 is established in terms of the t ‐matrix formalism by using the Lennard‐Jones interaction potential between the He atoms. The potential parameters are determined from the second virials in such a way that the errors are distributed in the entire temperature range. It is found that the excitation spectrum leads to better values in higher k ‐region, but the reproduction deteriorates in the range of low k ‐values.
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