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Direct transition from quantum escape to a phase diffusion regime in YBaCuO biepitaxial Josephson junctions
Luigi Longobardi1, Davide Massarotti, Daniela Stornaiuolo
1Seconda Universitá degli Studi di Napoli, Dipartimento di Ingegneria dell'Informazione, Aversa, Italy. llongobardi@ms.cc.sunysb.edu
Physical Review Letters
|September 26, 2012
Summary
Researchers engineered YBaCuO junctions to study quantum dissipation and phase dynamics. This work advances understanding of retrapping phenomena and quantum hybrid technologies.
Area of Science:
- Quantum physics
- Condensed matter physics
Background:
- Dissipation describes quantum system interactions with the environment.
- Understanding dissipation is key to controlling quantum phenomena and developing quantum technologies.
Purpose of the Study:
- To engineer grain boundary biepitaxial YBaCuO junctions for direct transition from quantum activated running state to phase diffusion regime.
- To investigate the influence of magnetic fields on quantum regime crossover and dissipation in these junctions.
Main Methods:
- Engineering of grain boundary biepitaxial YBaCuO junctions.
- Tuning the magnetic field to control the crossover to the quantum regime.
- Consistent description of dissipation using junction parameters.
Main Results:
- Achieved direct transition from a quantum activated running state to a phase diffusion regime.
- Demonstrated magnetic field tunability of the quantum regime crossover.
- Provided a consistent description of dissipation through junction parameters.
Conclusions:
- The study successfully engineered YBaCuO junctions to explore quantum dissipation and phase dynamics.
- Findings offer insights into retrapping phenomena and have implications for quantum hybrid technology development.
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