| A superfluid weak link |
| Healing Length |
| Weak links |
| Discovery by Emile Hoskinson |
| 4He Josephson Oscillation?? |
| Thermally driven quantum whistle |
| Thermally driven Josephson oscillations |
| Two temperature regimes |
| A 4He "strong link" |
| Phase slip oscillations |
| Quantum oscillations in two regimes |
| I
(Df) result |
| Are phase sips synchronous - I |
| Are phase slips synchronous - II |
| How about mode locking? |
| Test for mode locking |
| First vs. Nth slip |
| Synchronicity |
| Amplitude of quantum whistle |
| Interferometer section start |
| Superfluid dc-SQUID |
| 4He Gyroscope |
| 4He Interferometer - I |
| 4He Interferometer - II |
| Sensitivity |
| Applications |
| Future experiments |