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. © 2006 The American Physical Society.
CITATION STYLE
Rabl, P., Demille, D., Doyle, J. M., Lukin, M. D., Schoelkopf, R. J., & Zoller, P. (2006). Hybrid quantum processors: Molecular ensembles as quantum memory for solid state circuits. Physical Review Letters, 97(3). https://doi.org/10.1103/PhysRevLett.97.033003
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