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Phase-coherent solitonic Josephson heat oscillator
Claudio Guarcello1, Paolo Solinas2, Alessandro Braggio3
1NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127, Pisa, Italy. claudio.guarcello@nano.cnr.it.
Scientific Reports
|August 18, 2018
Summary
This study introduces novel devices for fast caloritronics, controlling heat currents using Josephson vortices (solitons). Soliton configuration enhances thermal power and temperature, enabling a tunable Josephson heat oscillator for nanoscale thermal applications.
Area of Science:
- Mesoscopic superconducting devices
- Phase-coherent caloritronics
- Quantum thermodynamics
Background:
- Phase-coherent caloritronics manipulates heat currents in superconducting devices via Josephson phase differences.
- Josephson vortices (solitons) in long Josephson junctions are known, but their role in coherent thermal transport is less understood.
Purpose of the Study:
- Introduce a new generation of devices for fast caloritronics.
- Investigate soliton-sustained coherent thermal transport.
- Demonstrate a fast solitonic Josephson heat oscillator.
Main Methods:
- Utilizing Josephson vortices (solitons) for heat control.
- Analyzing the relationship between soliton configuration and temperature profiles.
- Developing a Josephson heat oscillator driven by magnetic fields.
Main Results:
- Soliton configuration dictates the temperature profile within the junction.
- Each magnetically induced soliton significantly enhances local thermal power and temperature.
- A fast solitonic Josephson heat oscillator with frequency tunable to the magnetic drive's oscillation is demonstrated.
Conclusions:
- Soliton manipulation offers precise control over heat power and temperature in mesoscopic devices.
- The developed Josephson heat oscillator serves as a tunable thermal source for nanoscale heat engines and coherent thermal machines.
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