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Published on: December 4, 2017
Collective modes and f-wave pairing interactions in superfluid (3)He
J P Davis1, H Choi, J Pollanen
1Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
Physical Review Letters
|October 10, 2006
Summary
Precision measurements in superfluid helium-3 B reveal insights into quasiparticle and f-wave pairing interactions. These findings advance understanding of novel collective modes in superfluids.
Area of Science:
- Condensed Matter Physics
- Quantum Fluids
- Superfluidity
Background:
- Superfluid helium-3 B exhibits complex collective modes.
- These modes are influenced by fundamental interactions like quasiparticle and f-wave pairing.
Purpose of the Study:
- To precisely measure collective mode frequencies in superfluid (3)He-B.
- To investigate the dependence of these frequencies on f-wave pairing and Fermi liquid parameters.
- To explore implications for observing new order parameter collective modes.
Main Methods:
- Utilized interference of transverse sound within an acoustic cavity.
- Performed measurements across a range of pressures.
- Fitted experimental data to theoretical predictions.
Main Results:
- Collective mode frequencies were accurately measured.
- The data provided constraints on the strength of f-wave pairing.
- The Fermi liquid parameter F(2)(s) was also investigated.
Conclusions:
- The study provides crucial data for understanding superfluid (3)He-B.
- Results inform theoretical models of pairing interactions.
- Implications for the search for novel collective modes are discussed.
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