Towards the observation of phase locked Bloch oscillations in arrays of small Josephson junctions

Details Towards the observation of phase locked Bloch oscillations in arrays of small Josephson junctions Towards the observation of phase locked Bloch oscillations in arrays of small Josephson junctions

2011-06-27

arxiv.org/abs/1106.5328v3

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.84.174514

We have designed an experiment and performed extensive simulations and preliminary measurements to identify a set of realistic circuit parameters that should allow the observation of constant-current steps at I=2ef in short arrays of small Josephson junctions under external AC drive of frequency f. Observation of these steps demonstrating phase lock of the Bloch oscillations with the external drive requires a high-impedance environment for the array, which is provided by on-chip resistors close to the junctions. We show that the width and shape of the steps crucially depend on the shape of the drive and the electron temperature in the resistors.

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