Predicting Josephson Junction Critical Current from Room Temperature Data

Superconducting qubits are a promising technology to realize fault-tolerant quantum computers. To realize this promise at scale, it is essential to be able to predict the cryogenic performance of Josephson junctions from room temperature measurements of Josephson junctions. This can be accomplished by using the Ambegaokar-Baratoff relation to predict critical current of a junction from a series of room temperature junction resistances. These predictions taken at face value are not necessarily accurate. In this talk, we will discuss different data analysis techniques and mitigation strategies to use room temperature resistance data to more accurately predict cold junction critical current and qubit frequency.