Abstract
The dynamic structure factor S(\({\vec q}\), ω) of 4He is studied at zero temperature in the momentum region at and above the roton minimum by field-theoretical methods. The model is derived from the Gavoret-Nozières (GN) two particle propagator by introducing the concept of quasiparticles. In this way a connection between the field theory of GN and the phenomenological models of Zawadowski-Ruvalds-Solana (ZRS) type is obtained. An improved expression for the dynamic structure factor within ZRS-like models is found. Numerical results for S(\({\vec q}\), ω) are presented for momentum and energy independent effective interactions between quasiparticles.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
J. Gavoret and P. Nozikres, Ann. Phys 28, 349 (1964).
L. P. Pitaevskii, Sov. Phys. JETP 36,830 (1959).
A. Zawadowski, J. Ruvalds and J. Solana,Phys. Rev. A 5, 399 (1972).
R. Hastings and J. W. Halley, Phys. Rev. A 10,2488 (1974).
K. Fukushima and F. Iseki, Phys. Rev. B 38, 4448 (1988).
F.Pistolesi, Phys. Rev. Lett. 81, 397 (1998).
N. N. Bogoliubov, J. Phys. USSR 11,23 (1947).
J. Szwabinski and M. Weyrauch, to be published.
W. Gotze and M. Lucke,Phys. Rev. B 13, 3822 (1976).
B. FBk and J. Bossy, J. Low Temp. Phys. 112,1 (1998).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Szwabiński, J., Weyrauch, M. The Dynamic Structure Factor of 4He beyond the Roton Minimum. Journal of Low Temperature Physics 121, 327–332 (2000). https://doi.org/10.1023/A:1017529108783
Issue Date:
DOI: https://doi.org/10.1023/A:1017529108783