5 papers
Demonstration of Superconductor Shift Registers with Energy Dissipation Below Landauer's Thermodynamic Limit
Sergey K. Tolpygo, Evan B. Golden, Vasili K. Semenov
We study energy dissipation and propagation of information encoded by Josephson vortices in two types of circular shift register: a) a uniform register composed of sections of disc…
Fabrication and Properties of NbN/NbNx/NbN and Nb/NbNx/Nb Josephson Junctions
Sergey K. Tolpygo, Ravi Rastogi, David Kim +3
Increasing integration scale of superconductor electronics (SCE) requires employing kinetic inductors and self-shunted Josephson junctions (JJs) for miniaturizing inductors and JJs…
Characterization of Flux Trapping in and Fabrication of Large-Scale Superconductor Circuits Using AC-Biased Shift Registers With 108500 Josephson Junctions
Evan B. Golden, Neel A. Parmar, Vasili K. Semenov +1
A variety of superconductor integrated circuits comprising six ac-powered SFQ shift registers with a total of 27078 bits and 108500 Josephson junctions (JJs) per 5 mm x 5 mm chip h…
Development of a Neuromorphic Network Using BioSFQ Circuits
Evan B. Golden, Vasili K. Semenov, Sergey K. Tolpygo
Superconductor electronics (SCE) appear promising for low energy applications. However, the achieved and projected circuit densities are insufficient for direct competition with CM…
Characterization of Adiabatic Quantum-Flux-Parametrons in the MIT LL SFQ5ee+ Process
Sergey K. Tolpygo, Evan B. Golden, Christopher L. Ayala +4
Adiabatic quantum-flux-parametron (AQFP) logic is a proven energy-efficient superconductor technology for various applications. To address the scalability challenges, we investigat…