Effect of an Excitation Energy on the Specific Heat of Liquid Helium II and Its Relation to the Exchange Effect in a Non-Ideal Bose-Einstein Gas

Nature ◽  
1939 ◽  
Vol 144 (3648) ◽  
pp. 594-595 ◽  
Author(s):  
A. MICHELS ◽  
A. BIJL ◽  
J. DE BOER
Keyword(s):  
Excitation Energy ◽  
Specific Heat ◽  
Liquid Helium ◽  
Exchange Effect ◽  
Helium Ii ◽  
Bose Einstein

Effects of the T-matrix center-of-mass approximation in the Brueckner–Sawada theory of liquid helium II

1985 ◽  
Vol 63 (12) ◽  
pp. 1548-1554
Author(s):  
S. K. Bose ◽  
D. F. Goble
Keyword(s):  
Liquid Helium ◽  
Center Of Mass ◽  
Interacting Particles ◽  
Excitation Spectra ◽  
Helium Ii ◽  
Mass Approximation ◽  
Interparticle Separation ◽  
T Matrix ◽  
The Difference ◽  
Bose Einstein

As a model for liquid helium II, we study the Bose–Einstein gas with a two-body interaction potential of the form ~δ(r − a), where r is the interparticle separation. Excitation spectra for various values of a are calculated using the Brueckner–Sawada approach based on the concept of the T matrix. However, unlike the work of Brueckner and Sawada and many other related works that followed, we take into account the dependence of the T matrix on the center-of-mass momentum of the interacting particles. Excitation spectra calculated with and without this dependence, using two different expressions for the two-particle propagator, indicate the validity of the Brueckner and Sawada center-of-mass approximation for physically interesting values of a. The difference between the two spectra is found to increase as a increases.

scholarly journals Excitation Energy of Liquid Helium. II

1974 ◽  
Vol 52 (3) ◽  
pp. 811-821 ◽  
Author(s):  
G. S. Grest ◽  
A. K. Rajagopal
Keyword(s):  
Excitation Energy ◽  
Liquid Helium ◽  
Helium Ii

scholarly journals Excitation Energy of Liquid Helium II

1974 ◽  
Vol 52 (5) ◽  
pp. 1719-1719 ◽  
Author(s):  
G. S. Grest ◽  
A. K. Rajagopal
Keyword(s):  
Excitation Energy ◽  
Liquid Helium ◽  
Helium Ii

scholarly journals On the Excitation Energy in Liquid Helium II

1970 ◽  
Vol 44 (3) ◽  
pp. 565-573 ◽  
Author(s):  
Takeji Kebukawa ◽  
Shuichiro Yamasaki ◽  
Sigenobu Sunakawa
Keyword(s):  
Excitation Energy ◽  
Liquid Helium ◽  
Helium Ii

Surface Flow of Liquid Helium II and Bose-Einstein Degeneracy

Nature ◽  
1944 ◽  
Vol 153 (3881) ◽  
pp. 342-342 ◽  
Author(s):  
D. V. GOGATE ◽  
R. N. RAI
Keyword(s):  
Liquid Helium ◽  
Surface Flow ◽  
Helium Ii ◽  
Bose Einstein

scholarly journals On the Mechano-Caloric Effect in Liquid Helium II

1950 ◽  
Vol 5 (6) ◽  
pp. 1010-1013 ◽  
Author(s):  
S. Nakajima ◽  
M. Shimizu
Keyword(s):  
Liquid Helium ◽  
Helium Ii ◽  
Caloric Effect
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