Demonstration of a Josephson vortex-based memory cell with microwave energy-efficient readoutстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
Аннотация:The ongoing progress of superconducting logic systems with Josephson junctions as base elementsrequires the development of compatible cryogenic memory. Long enough junctions subject tomagnetic field host quantum phase 2π-singularities—Josephson vortices. Here, we report therealization of the superconducting memory cell whose state is encoded by the number of presentJosephson vortices. By integrating the junction into a coplanar resonator and by applying amicrowaveexcitation well below the critical current, we are able to control the state of the system in an energyefficient and non-destructive manner. The memory effect arises due to the presence of the natural edge barrier for Josephson vortices. The performance of the device is evaluated, and the routes for creating scalable cryogenic memories directly compatible with superconducting microwavetechnologies are discussed.