Josephson effect and quantum phase slippage in superfluids
O. Avenel, E. Varoquaux
DOI 10.1103/PhysRevLett.60.416 · Physical Review Letters
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Abstract
We describe the operation of a hydromechanical resonator immersed in He4 and B3 superfluids and opened on the main bath by two holes, a micro-orifice acting as a weak link and a long parallel channel. Transitions between adjacent quantum states differing by one hydrodynamic circulation quantum can be induced coherently, yielding a succession of steps arranged in a staircase pattern. In He3 at about 0.8 mK and 0 bar, a nearly ideal, nondissipative hydrodynamic Josephson effect can be observed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| He3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.0008 | Pressure unresolved | onset |
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