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Self‐Consistent Scheme for Evaluating the Pressure Dependent Zero‐Sound Velocity in Normal Liquid 3 He
Author(s) -
Singh R. P.,
Mishra L. K.
Publication year - 1992
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.2221690105
Subject(s) - zero sound , propagator , zero (linguistics) , pseudopotential , physics , random phase approximation , quantum mechanics , mathematical analysis , mathematics , fermi liquid theory , linguistics , philosophy , electron
Using the theoretical model developed recently for liquid 3 He, the pressure dependent zero‐sound velocities at T = 0 K are calculated by a self‐consistent procedure. Introducing a pseudopotential for the effective interaction between two 3 He atoms of parallel and antiparallel spin, reasonable agreement with the experimental data of Wheatley et al. is found. An exact agreement with the experimental value is obtained by introducing a term into the theory to account for the local field corrections to the bare particle‐hole propagator beyond the random phase approximation (RPA) in a parametric way. The present theory seems to indicate the propagation of a new kind of sound wave in liquid 3 He.