| Autor: |
Blum, Susanne, O'Brien, Christopher, Lauk, Nikolai, Bushev, Pavel, Fleischhauer, Michael, Morigi, Giovanna |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Phys. Rev. A 91, 033834 (2015) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevA.91.033834 |
| Popis: |
A protocol is discussed which allows one to realize a transducer for single photons between the optical and the microwave frequency range. The transducer is a spin ensemble, where the individual emitters possess both an optical and a magnetic-dipole transition. Reversible frequency conversion is realized by combining optical photon storage, by means of EIT, with the controlled switching of the coupling between the magnetic-dipole transition and a superconducting qubit, which is realized by means of a microwave cavity. The efficiency is quantified by the global fidelity for transferring coherently a qubit excitation between a single optical photon and the superconducting qubit. We test various strategies and show that the total efficiency is essentially limited by the optical quantum memory: It can exceed 80% for ensembles of NV centers and approaches 99% for cold atomic ensembles, assuming state-of-the-art experimental parameters. This protocol allows one to bridge the gap between the optical and the microwave regime so to efficiently combine superconducting and optical components in quantum networks. |
| Databáze: |
arXiv |
| Externí odkaz: |
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