338 citations · 521 across the 9 of their papers we have counts for
10 papers
Scaling NbTiN-based ac-powered Josephson digital to 400M devices/cm
Anna Herr, Quentin Herr, Steve Brebels +9
We describe a fabrication stackup for digital logic with 16 superconducting NbTiN layers, self-shunted a-silicon barrier Josephson Junctions (JJs), and low loss, high- tunable H…
Superconducting Pulse Conserving Logic and Josephson-SRAM
Quentin Herr, Trent Josephsen, Anna Herr
Superconducting digital Pulse-Conserving Logic (PCL) and Josephson SRAM (JSRAM) memory together enable scalable circuits with energy efficiency 100x beyond leading-node CMOS. Circu…
Isochronous Data Link Across a Superconducting Nb Flex Cable with 5 femtojoules per Bit
Haitao Dai, Corey Kegerreis, Deepal Wehella Gamage +10
Interconnect properties position superconducting digital circuits to build large, high performance, power efficient digital systems. We report a board-to-board communication data l…
Synchronous Chip-to-Chip Communication with a Multi-Chip Resonator Clock Distribution Network
Jonathan Egan, Max Nielsen, Joshua Strong +5
Superconducting digital circuits are a promising approach to build packaged-level integrated systems with high energy-efficiency and computational density. In such systems, perform…
Measurement and Data-Assisted Simulation of Bit Error Rate in RQL Circuits
Quentin Herr, Alex Braun, Andrew Brownfield +4
A circuit-simulation-based method is used to determine the thermally-induced bit error rate of superconducting logic circuits. Simulations are used to evaluate the multidimensional…
Propagation of Picosecond Pulses on Superconducting Transmission Line Interconnects
Vladimir V. Talanov, Derek Knee, David Harms +5
Interconnects are a major discriminator for superconducting digital technology, enabling energy efficient data transfer and high-bandwidth heterogeneous integration. We report a me…
Experimental demonstration of a Josephson magnetic memory cell with a programmable π-junction
I. M. Dayton, T. Sage, E. C. Gingrich +9
We experimentally demonstrate the operation of a Josephson magnetic random access memory unit cell, built with a Ni_80Fe_20/Cu/Ni pseudo spin-valve Josephson junction with Nb elect…
Reproducible Operating Margins on a 72,800-Device Digital Superconducting Chip
Quentin P. Herr, Joshua Osborne, Micah J. A. Stoutimore +6
We report the design and test of Reciprocal Quantum Logic shift-register yield vehicles consisting of up to 72,800 Josephson junction devices per die, the largest digital supercond…
An 8-bit carry look-ahead adder with 150 ps latency and sub-microwatt power dissipation at 10 GHz
Anna Y. Herr, Quentin P. Herr, Oliver T. Oberg +4
Reciprocal Quantum Logic combines the speed and power-efficiency of single-flux quantum superconductor devices with design features that are similar to CMOS. We have demonstrated a…
Ultra-Low-Power Superconductor Logic
Quentin P. Herr, Anna Y. Herr, Oliver T. Oberg +1
We have developed a new superconducting digital technology, Reciprocal Quantum Logic, that uses AC power carried on a transmission line, which also serves as a clock. Using simple…