Stochastic simulation of SFQ logic

The high speed and low power of Single Flux Quantum logic (SFQ) are extremely attractive, and significant capabilities have been demonstrated in Nb technology. However the burden of cooling to 4.2K has been a barrier to its widespread implementation. The advent of High Temperature Superconductors (HTS), raises the prospect of more accessible temperatures. This paper examines some theoretical constraints on the implementation of SFQ in HTS, and derives some ideas about the parameters required of any HTS SFQ technology.