Robust quantum gates via a photon triggering electromagnetically induced transparency
| Autor: | Yao-zhi Zhou, Cheng-Zu Li |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Photon business.industry Electromagnetically induced transparency Cavity quantum electrodynamics Physics::Optics GeneralLiterature_MISCELLANEOUS Atomic and Molecular Physics and Optics law.invention Quantum gate law Optical cavity Optoelectronics Spontaneous emission Atomic physics business Quantum Quantum computer |
| Zdroj: | Physical Review A. 84 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.84.044304 |
| Popis: | We propose a scheme to achieve a parallelized controlled-NOT (c-not) gate based on electromagnetically induced transparency (EIT) and cavity-assisted photon scattering. By using the flying photon as the control bit, we can implement a conditional transfer between two logical states of an atom trapped in the cavity with high fidelity and on a microsecond time scale. Thanks to the fact that the photon is well suited for scalable quantum computation, a quantum c-not gate between the single-photon pulses and the nonlocal gate on remote atoms are obtained by reflecting the photon pulse from an optical cavity with a single-trapped atom. Our protocol is robust for spontaneous emission and works quite well in the bad-cavity limit, which makes it more applicable in the laboratory with current experimental techniques. |
| Databáze: | OpenAIRE |
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