Abstract
I derive a set of sufficient and (barring certain pathologies) necessary conditions for a one-component system with velocity-independent forces to have a super-fluid fraction ρs/ρ equal to unity at zero temperature: In addition to a condition closely related (but not obviously equivalent) to the usual one of off-diagonal long-range order, the ground state should possess unbroken invariance under both spatial translation and time reversal. Some generalizations are made to the case of multicomponent systems.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 927-941 |
| Number of pages | 15 |
| Journal | Journal of Statistical Physics |
| Volume | 93 |
| Issue number | 3-4 |
| State | Published - Nov 1998 |
Keywords
- Long-range order
- Superfluidity
- Two-fluid model
ASJC Scopus subject areas
- Mathematical Physics
- Physics and Astronomy(all)
- Statistical and Nonlinear Physics