Description:

Title: Generating Macroscopic Quantum Microwave States with a Cooper Pair Laser

Speaker: Miles Blencowe, Dartmouth College

Abstract: We consider a voltage-biased Cooper-pair transistor (CPT) in a high-Q superconducting microwave cavity. When the energy given to a tunneling Cooper pair by the voltage bias is equal to a multiple of the cavity photon frequency, the cavity is pumped to a strongly nonequilibrium state. The cavity photons act back on the CPT, allowing us to enter a regime of strongly correlated electronic-photonic transport. We have observed the effects of photonic backaction on Cooper-pair transport, and see clear evidence for single-emitter lasing in the form of emission dominated by stimulated transport processes. The microwave lasing state is predicted to be strongly non-classical in nature.

Host: Jens Koch

Keywords: Physics, Astronomy, Condensed Matter