title: Superconducting microwave multivibrator produced by coherent feedback.
abstract: We investigate a nonlinear coherent feedback circuit constructed from preexisting 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 [Phil. Trans. R. Soc. A (to be published)]) that systematically interpreted an idealized schematic of the system as a quantum optic feedback network.
authors.affiliation: JILA, National Institute of Standards and Technology and the University of Colorado, Boulder, Colorado 80309, USA. jkerc@jila.colorado.edu
authors.forename: Joseph
authors.initials: J
authors.lastname: Kerckhoff
authors.forename: K W
authors.initials: KW
authors.lastname: Lehnert