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Updated: Jul 9, 2026
06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
Controlled generation of 3D vortices in driven atomic Josephson junctions.
Vijay Pal Singh1, Ludwig Mathey2,3, Herwig Ott4
1Quantum Research Center, Technology Innovation Institute, Masdar City 9639, Abu Dhabi, United Arab Emirates.
Summary
We developed an atomic Josephson junction to generate controllable 3D solitary waves in quantum fluids. This system precisely controls vortex rings and rarefaction pulses, enabling new studies in quantum turbulence.
Area of Science:
- Quantum physics
- Fluid dynamics
- Condensed matter physics
Background:
- Quantum fluids exhibit complex phenomena like solitons.
- Generating and controlling these excitations is crucial for fundamental research.
Purpose of the Study:
- To propose a novel ac-driven atomic Josephson junction for generating 3D solitary waves.
- To enable controlled emission and study of quantum fluid excitations.
Main Methods:
- Utilizing an ac-driven atomic Josephson junction.
- Leveraging the Shapiro-step phenomenon for deterministic emission.
- Controlling barrier height to tune excitation types (vortex rings vs. rarefaction pulses).
Main Results:
- Demonstrated generation of both vortex rings and rarefaction pulses, spanning the Jones-Roberts family of solitons.
- Achieved deterministic single- and multi-excitation emission via Shapiro steps.
- Observed leapfrogging dynamics and decay processes of multiple coaxial rings.
Conclusions:
- The ac-driven Josephson junction provides a reproducible platform for studying 3D solitonic excitations.
- This method facilitates precision studies of nonlinear vortex dynamics, dissipation, and quantum turbulence.
- Opens avenues for exploring quantum phenomena in trapped superfluids.
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