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arXiv · 1301.3162

Direct transition from quantum escape to phase diffusion regime in YBaCuO biepitaxial Josephson Junctions

Luigi Longobardi·Davide Massarotti·Daniela Stornaiuolo·Luca Galletti·Giacomo Rotoli·Floriana Lombardi·Francesco Tafuri
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Abstract

Dissipation encodes 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 quantum activated running state to phase diffusion regime. The cross-over to the quantum regime is tuned by the magnetic field and dissipation is encoded in a fully consistent set of junction parameters. To unravel phase dynamics in moderately damped systems is of general interest for advances in the comprehension of retrapping phenomena and in view of quantum hybrid technology.

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Luigi Longobardi, Davide Massarotti, Daniela Stornaiuolo, Luca Galletti, Giacomo Rotoli, Floriana Lombardi, Francesco Tafuri. 2013-01-14. Direct transition from quantum escape to phase diffusion regime in YBaCuO biepitaxial Josephson Junctions. https://doi.org/10.1103/physrevlett.109.050601

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