The Critical Temperature of Superfluid Helium and the Fraction of Nonzero Momentum Condensation
Abstract
Using the method of momentum nonconserved Green function, we derive a critical temperature value Tλ (1)={2.71}°K for 4He system below which the system undergoes a phase transition and has a nonuniform condensate. The temperature dependence of the speed of the first sound near T=0°K is also discussed.
- Publication:
-
Communications in Theoretical Physics
- Pub Date:
- June 1986
- DOI:
- 10.1088/0253-6102/5/4/351
- Bibcode:
- 1986CoTPh...5..351N