Superfluid Optomechanics: Coupling of a Superfluid to a Superconducting Condensate

L. A. DeLorenzo, K. C. Schwab

We investigate the low loss acoustic motion of superfluid ${}^4$He parametrically coupled to a very low loss, superconducting Nb, TE${}_{011}$ microwave resonator, forming a gram-scale…