Quantized phase slippage in superfluid sup 4 He

Journal Article · Mon Apr 27 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.2624· OSTI ID:7234499

Amar, A; Sasaki, Y; Lozes, R L; Davis, J C; Packard, R E ^[1]

---

1. Department of Physics, University of California, Berkeley, California 94720 (United States)

We have studied dissipative phase-slip events in the oscillatory superflow of {sup 4}He through two different orifices of submicron size. The dissipation events are found to be caused by the phase difference across the orifice changing by 2{pi}{ital n}, where the slip integer {ital n} depends on the orifice geometry, flow direction, and temperature. The temperature dependence of the phase-slip critical velocity indicates that surface microstructure determines the magnitude of relevant energy barriers.

• OSTI ID: 7234499
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:17; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

665420* -- Superfluidity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISSIPATION FACTOR
EVEN-EVEN NUCLEI
FLUID FLOW
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
OPENINGS
ORIFICES
QUANTIZATION
QUANTUM FLUIDS
SLIP
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
VORTICES