The evidence for macroscopic quantum tunneling (MQT) in Josephson junctions at low temperatures has been reassessed. Swept bias escape distributions have been modeled with an algorithm-based simulation and the results compared with data from representative published experiments. Signatures expected of a crossover to MQT are not found in the analyzed data.
@article{arxiv.1706.03709,
title = {Investigation of low temperature quantum crossover in Josephson junctions},
author = {James A. Blackburn and Matteo Cirillo and Niels Gronbech-Jensen},
journal= {arXiv preprint arXiv:1706.03709},
year = {2017}
}