Hybrid Quantum Processors: Molecular Ensembles as Quantum Memory for Solid State Circuits

Author(s): P. Rabl, D. DeMille, J. Doyle, R. J. Schoelkopf, P. Zoller

Journal: Physical Review Letters

Volume: 97

Page(s): 033003

Year: 2006

DOI Number: 10.1103/PhysRevLett.97.033003

Link: Link to publication


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.

Note: http://arxiv.org/abs/quant-ph/0604140

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