Summary
We study the elementary-excitation spectrum of a system of bosons interacting with a spherical-shell potential function from a theory combining the advantages of the method of correlated-basis-function and canonical transformation. By fitting physical parameters with those of liquid helium four into our derived equations, the computed results agree reasonably well with the experimental ones obtained from neutron scattering.
Riassunto
Si studia lo spettro di eccitazione elementare di un sistema di bosoni che interagiscono con una funzione di Potenziale di strato sferico da una teoria che combina i vantaggi del metodo della funzione di base correlata e della trasformazione canonica. Approssimando i parametri fisici con quelli dell’elio IV liquido nelle nostre equazioni derivate, i risultati calcolati sono in buon accordo con quelli sperimentali ottenuti dalla diffusione dei neutroni.
Similar content being viewed by others
References
K. W. Wong andP. C. W. Fung:Nuovo Cimento B,25, 595 (1975).
P. C. W. Fung, H. K. Tsang andK. W. Wong:Nuovo Cimento B,28, 313 (1975).
K. W. Wong, P. C. W. Fung andC. C. Lau:Phys. Rev. A,22, 1272 (1980).
W. K. Chow: Ph.D. Thesis, University of Hong Kong (1982).
W. K. Chow, K. W. Wong andP. C. W. Fung:J. Phys. Soc. Jpn.,54, 4490 (1986).
R. Abe:Prog. Theor. Phys.,19, 699 (1958).
A. Coniglio andM. Marinaro:Nuovo Cimento B,48, 262 (1967).
D. H. Kobe:Ann. Phys. (N. Y.),47, 15 (1968).
L. Reatto andJ. P. Straley:Phys. Rev.,183, 321 (1969).
W. A. B. Evans andY. Imvt:Nuovo Cimento B,63, 155 (1969).
W. A. B. Evans andR. I. M. Rashid:J. Low Temp. Phys.,11, 93 (1973).
P. Dorre, H. Haug andD. B. Tran Thoai:J. Low Temp. Phys.,35, 465 (1979).
A. L. Fetter:Phys. Rev. B,23, 2425 (1981).
N. N. Bogoliubov:J. Phys. (Moscow),11, 23 (1947).
M. D. Girardeau andR. Arnowitt:Phys. Rev.,113, 755 (1959).
N.M. Hugenholtz andD. Pines:Phys. Rev.,116, 189 (1959).
M. A. Pokrant:Phys. Rev. A,6, 1588 (1972).
C. De Michelis andL. Reatto:Phys. Lett. A,50, 275 (1974).
H. W. Graben:Phys. Lett. A,66; 63 (1978).
H.A. Mook:Phys. Rev. Lett.,32, 1167 (1974).
E.A. Cowley andA. D. B. Woods:Can. J. Phys.,49, 177 (1971).
W. Meyer, K. W. Wong andJ. H. Marhurger:Phys. Rev. B,14, 1932 (1976).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fung, P.C.W., Wong, K.W. & Chow, W.K. Elementary-excitation spectrum of a weakly interacting bose system. Nuov Cim B 95, 155–170 (1986). https://doi.org/10.1007/BF02749008
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02749008