Superconducting disordered neural networks for neuromorphic processing with fluxons.

In superconductors, magnetic fields are quantized into discrete fluxons (flux quanta Φ), made of microscopic circulating supercurrents. We introduce a multiterminal synapse network comprising a disordered array of superconducting loops with Josephson junctions. The loops can trap fluxons defining memory, while the junctions allow their movement between loops.

Direct-coupled micro-magnetometer with Y-Ba-Cu-O nano-slit SQUID fabricated with a focused helium ion beam.

Direct write patterning of high-transition temperature (high- ) superconducting oxide thin films with a focused helium ion beam is a formidable approach for the scaling of high- circuit feature sizes down to the nanoscale. In this letter, we report using this technique to create a sensitive micro superconducting quantum interference device (SQUID) magnetometer with a sensing area of about 100 × 100 m. The device is fabricated from a single 35-nm thick YBaCuO film.