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Coherent vortex dynamics in a strongly interacting superfluid on a silicon chip
Yauhen P Sachkou1, Christopher G Baker1, Glen I Harris1
1Australian Research Council Centre of Excellence for Engineered Quantum Systems, School of Mathematics and Physics, University of Queensland, St. Lucia, Queensland 4072, Australia.
Science (New York, N.Y.)
|December 21, 2019
Summary
Researchers observed coherent dynamics of quantized vortices in superfluids using a microscale platform. This breakthrough suppresses thermal diffusion, enabling new quantum technologies and superfluid studies.
Area of Science:
- Condensed Matter Physics
- Quantum Fluids
Background:
- Quantized vortices govern two-dimensional superfluid dynamics.
- Surface effects impede direct observation of coherent vortex dynamics in strongly interacting systems.
Purpose of the Study:
- To overcome limitations in observing superfluid vortex dynamics.
- To establish a microscale platform for studying coherent vortex behavior.
Main Methods:
- Confining superfluid helium in a microscale thin film on a silicon chip.
- Utilizing an on-chip optical microcavity for laser-initiated vortex generation.
- Nondestructive, single-shot observation of vortex decay.
Main Results:
- Demonstrated coherent dynamics of quasi-two-dimensional vortices.
- Suppressed thermal vortex diffusion by five orders of magnitude.
- Established a microscale platform for superfluid research.
Conclusions:
- The developed on-chip platform enables study of emergent phenomena in strongly interacting superfluids.
- This research paves the way for quantum technologies like precision inertial sensors.
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