# Direct transition from quantum escape to a phase diffusion regime in YBaCuO biepitaxial Josephson junctions.

@article{Longobardi2012DirectTF, title={Direct transition from quantum escape to a phase diffusion regime in YBaCuO biepitaxial Josephson junctions.}, author={Luigi Longobardi and Davide Massarotti and D. Stornaiuolo and Luca Galletti and Giacomo Rotoli and Floriana Lombardi and Francesco Tafuri}, journal={Physical review letters}, year={2012}, volume={109 5}, pages={ 050601 } }

Dissipation encodes the interaction of a quantum system with the environment and regulates the activation regimes of a Brownian particle. We have engineered grain boundary biepitaxial YBaCuO junctions to drive a direct transition from a quantum activated running state to a phase diffusion regime. The crossover to the quantum regime is tuned by the magnetic field and dissipation is described by a fully consistent set of junction parameters. To unravel phase dynamics in moderately damped systems…

## 30 Citations

Macroscopic quantum tunneling and retrapping processes in moderately damped YBaCuO Josephson junctions

- Physics
- 2013

The moderately damped regime in Josephson junctions (JJ) is quite common in devices characterized by low critical currents and, therefore, by low Josephson energies. Measurements of the switching…

Macroscopic quantum tunnelling in spin filter ferromagnetic Josephson junctions

- PhysicsNature communications
- 2015

Evidence for active quantum applications of S-F-S junctions is demonstrated, through the observation of macroscopic quantum tunnelling in Josephson junctions with GdN ferromagnetic insulator barriers, which paves the way to the active use of spin filter Josephson systems in quantum hybrid circuits.

Study of Phase Dynamics in Moderately Damped Josephson Junctions

- Physics
- 2013

The moderately damped regime (MDR) in a Josephson junction (JJ) is quite distinct from the well-known case of underdamped systems and quite common in devices characterized by low critical currents.…

Nonmonotonous temperature dependence of Shapiro steps in YBCO grain boundary junctions

- PhysicsBeilstein journal of nanotechnology
- 2021

Non-monotonic dependences of step heights for different external signal frequencies were found in the limit of a weak driving signal, with the maxima occurring at different points as function of the temperature.

Bias current ramp rate dependence of the crossover temperature from Kramers to phase diffusion switching in moderately damped NbN/AlN/NbN Josephson junctions

- Physics
- 2014

We investigate the phase dynamics of moderately damped NbN/AlN/NbN Josephson junctions and we present experimental results on detailed aspects of phase diffusion processes. We measure both single…

Determination of the dissipation in superconducting Josephson junctions

- Physics
- 2015

The results relative to macroscopic quantum tunneling rate, out of the metastable state of Josephson junctions, are examined in view of determining the effect of dissipation. We adopt a simple…

Phase Dynamics and Macroscopic Quantum Tunneling

- PhysicsFundamentals and Frontiers of the Josephson Effect
- 2019

We will review concepts, theory and experimental results on whether and in which conditions a quantum system, governed by a single macroscopic degree of freedom interacting with its environment, can…

Electrodynamics of Josephson junctions containing strong ferromagnets

- PhysicsPhysical Review B
- 2018

Triplet supercurrents in multilayer ferromagnetic Josephson junctions with misaligned magnetization survive longer barrier thicknesses when compared with singlet supercurrents. The distinctive…

Recent Achievements on the Physics of High-TC Superconductor Josephson Junctions: Background, Perspectives and Inspiration

- Physics
- 2013

Coherent passage of Cooper pairs in a Josephson junction (JJ) above the liquid nitrogen temperature has been the first impressive revolutionary effect induced by high critical temperature…

## References

SHOWING 1-10 OF 37 REFERENCES

Dynamics of Josephson Junctions and Circuits

- Physics
- 1986

This monograph offers a detailed description of the statistics, dynamics and statics of Josephson junctions. Particular emphasis is placed on the dynamics of new circuits and analog and digital…

APPL

- Computer Science
- 2001

A prototype probability package named APPL (A Probability Programming Language) is presented that can be used to manipulate random variables and examples illustrate its use.

Phys

- Rev. B 84, 184504
- 2011

Ye Tian

- D.J. Cui, G.H. Chen, D.N. Zheng, X.N. Jing, Li Lu, S.P. Zhao, and Siyuan Han, Phys. Rev. Lett. 107, 067004
- 2011

Phys

- Rev. Lett. 94, 247002
- 2005

Report Progress in Physics 68

- 2573
- 2005

Phys

- 58, 3822 (1985); P. Silvestrini, S. Pagano, R. Cristiano, O. Liengme, and K. E. Gray, Phys. Rev. Lett. 60, 844 (1988); M.G. Castellano, G. Torrioli, F. Chiarello, C. Cosmelli, and P. Carelli, J. Appl. Phys. 86, 6405 (1999). PRL 109, 050601
- 2012

Phys

- Rev. Lett. 107, 067004
- 2011

Supercond

- Sci. Technol. 24, 045008
- 2011

Phys

- Rev. B 79, 104509
- 2009