1.
Phys Rev B Condens Matter
; 52(22): 16096-16100, 1995 Dec 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-9980992
2.
Phys Rev Lett
; 89(7): 075301, 2002 Aug 12.
Artigo
em Inglês
| MEDLINE
| ID: mdl-12190524
RESUMO
One introduces a model of the superfluid state of a Bose liquid with repulsion between bosons, in which at T=0, along with a weak single-particle Bose-Einstein condensate, there exists an intensive pair coherent condensate, analogous to the Cooper condensate in a Fermi liquid with attraction between fermions. A closed system of nonlinear integral equations for the normal and anomalous self-energy parts is solved numerically, and a quasiparticle spectrum is obtained, which is in good agreement with the experimental spectrum of elementary excitations in superfluid 4He. It is shown that the roton minimum in the spectrum is associated with the negative minimum of the Fourier component of the pair interaction potential.
3.
Phys Rev D Part Fields
; 54(10): 6537-6543, 1996 Nov 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-10020655
4.
Phys Rev D Part Fields
; 52(4): 2594-2597, 1995 Aug 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-10019476