dorsal/arxiv
View SchemaAtomic Quantum Memory for Photonic Qubits via Scattering in Cavity QED
| Authors | Hiroyuki Yamada, Katsuji Yamamoto |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0506215 |
| URL | https://arxiv.org/abs/quant-ph/0506215 |
Abstract
We investigate a scheme of atomic quantum memory to store photonic qubits in cavity QED. This is motivated on the recent observation that the quantum-state swapping between a single-photon pulse and a Lambda-type atom trapped in a cavity is ideally realized via scattering for some specific case in the strong coupling cavity regime [T. W. Chen, C. K. Law, and P. T. Leung, Phys. Rev. A 69, 063810 (2004)]. We derive a simple formula for calculating the fidelity of this atom-photon swapping for quantum memory. We further propose a feasible method which implements conditionally the quantum memory operation with the fidelity of almost unity even if the atom-photon coupling is not so strong. This method can also be applied to store a photonic entanglement in spatially separated atomic quantum memories.
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"abstract": "We investigate a scheme of atomic quantum memory to store photonic qubits in\ncavity QED. This is motivated on the recent observation that the quantum-state\nswapping between a single-photon pulse and a Lambda-type atom trapped in a\ncavity is ideally realized via scattering for some specific case in the strong\ncoupling cavity regime [T. W. Chen, C. K. Law, and P. T. Leung, Phys. Rev. A\n69, 063810 (2004)]. We derive a simple formula for calculating the fidelity of\nthis atom-photon swapping for quantum memory. We further propose a feasible\nmethod which implements conditionally the quantum memory operation with the\nfidelity of almost unity even if the atom-photon coupling is not so strong.\nThis method can also be applied to store a photonic entanglement in spatially\nseparated atomic quantum memories.",
"arxiv_id": "quant-ph/0506215",
"authors": [
"Hiroyuki Yamada",
"Katsuji Yamamoto"
],
"categories": [
"quant-ph"
],
"title": "Atomic Quantum Memory for Photonic Qubits via Scattering in Cavity QED",
"url": "https://arxiv.org/abs/quant-ph/0506215"
},
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