We investigate a coherent nonlinear feedback circuit constructed from pre-existing superconducting microwave devices. The network exhibits emergent bistable and astable states, and we demonstrate its operation as a latch and the frequency locking of its oscillations. While the network is tedious to model by hand, our observations agree quite well with the semiclassical dynamical model produced by a new software package [N. Tezak et al., arXiv:1111.3081v1] that systematically interpreted an idealized schematic of the system as a quantum optic feedback network.
@article{arxiv.1204.0024,
title = {A superconducting microwave multivibrator produced by coherent feedback},
author = {Joseph Kerckhoff and K. W. Lehnert},
journal= {arXiv preprint arXiv:1204.0024},
year = {2012}
}
Comments
9 double-spaced pages, 5 figures and supplement. To appear in Phys. Rev. Lett