Novel digital computing circuits will be studied to demonstrate abilities not available in CMOS logic. Superconducting digital logic allows multi-GHz rates and demonstrates record computing efficiency in reversible logic gate circuits. This provides an opportunity for fundamental physics research on reversible computing. Recently LPS has developed designs for reversible computing gates based on novel flux-quanta dynamics, e.g. in Reversible fluxon logic: Topological particles allow ballistic gates along one-dimensional paths. A key innovation is the usage of long-Josephson junctions as an essential part of the gate, but the work is being expanded into experiments. In addition, the very low dissipation that results from efficient logic must be tested, to quantify the dissipation. This project will explore reversible circuits with flux quanta using new circuit layouts, simulations, experimental testing, and analyses. This work will occur in a group which also studies superconducting qubits and qubit defects such that there is an opportunity to learn quantum information science as well. 

We are seeking exceptional candidates with a Ph.D. in physics that have experience in custom cryogenic hardware, superconducting circuits, electronic testing, and RF measurements.