Hybrid quantum processors: Molecular ensembles as quantum memory for solid state circuits

P. Rabl, D. Demille, J. M. Doyle, M. D. Lukin, R. J. Schoelkopf, P. Zoller

Research output: Contribution to journalArticlepeer-review

354 Scopus citations

Abstract

We 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 μm, 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.

Original languageEnglish
Article number033003
JournalPhysical Review Letters
Volume97
Issue number3
DOIs
StatePublished - 2006
Externally publishedYes

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