Rabl, P.DeMille, D.Doyle, JohnLukin, MikhailSchoelkopf, R. J.Zoller, P.2016-08-232006Rabl, P., D. DeMille, J. M. Doyle, M. D. Lukin, R. J. Schoelkopf, and P. Zoller. 2006. “Hybrid Quantum Processors: Molecular Ensembles as Quantum Memory for Solid State Circuits.” Physical Review Letters 97 (3) (July 21). doi:10.1103/physrevlett.97.033003.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:27867252We investigate a hybrid quantum circuit where ensembles of cold polar molecules serve as long-lived quantum memories and optical interfaces for solid state quantum processors. The quantum memory realized by collective spin states (ensemble qubit) is coupled to a high-Q stripline cavity via microwave Raman processes. We show that, for convenient trap-surface distances of a few m, strong coupling between the cavity and ensemble qubit can be achieved. We discuss basic quantum information protocols, including a swap from the cavity photon bus to the molecular quantum memory, and a deterministic two qubit gate. Finally, we investigate coherence properties of molecular ensemble quantum bits.en-USJournal Article2016-08-2310.1103/PhysRevLett.97.033003