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Updated: Mar 6, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Universal quantum gates for hybrid system assisted by atomic ensembles embedded in double-sided optical cavities
A-Peng Liu1, Liu-Yong Cheng2, Qi Guo3
1Shanxi Institute of Technology, Yangquan, Shanxi 045000, China.
Abstract:
We propose deterministic schemes for controlled-NOT (CNOT), Toffoli, and Fredkin gates between flying photon qubits and the collective spin wave (magnon) of an atomic ensemble inside double-sided optical microcavities. All the gates can be accomplished with 100% success probability in principle and no additional qubit is required. Atomic ensemble is employed so that light-matter coupling is remarkably improved by collective enhancement. We qualified the performance of the gates and the results show that they can be faithfully constituted with current experimental techniques.
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