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arXiv · 2308.09995

Josephson vortex-based memory

Dmitrii S. Kalashnikov·Vsevolod I. Ruzhitskiy·Andrey G. Shishkin·Igor A. Golovchanskiy·Mikhail Yu. Kupriyanov·Igor I. Soloviev·Dimitri Roditchev·Vasily S. Stolyarov
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Abstract

Josephson junctions are currently used as base elements of superconducting logic systems. Long enough junctions subject to magnetic field host quantum phase 2{\pi}-singularities - Josephson vortices. Here we report the realization of the superconducting memory whose state is encoded by the number of present Josephson vortices. By integrating the junction into a coplanar resonator and by applying a microwave excitation well below the critical current, we were able to control the state of the memory in an energy-efficent and non-destructive manner. The performance of the device is evaluated, and the routes for creating scalable cryogenic memories directly compatible with superconducting microwave technologies are discussed.

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Dmitrii S. Kalashnikov, Vsevolod I. Ruzhitskiy, Andrey G. Shishkin, Igor A. Golovchanskiy, Mikhail Yu. Kupriyanov, Igor I. Soloviev, Dimitri Roditchev, Vasily S. Stolyarov. 2023-08-19. Josephson vortex-based memory. https://doi.org/10.1038/s42005-024-01570-4

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