dorsal/arxiv
View SchemaDirect measurement of decoherence for entanglement between a photon and stored atomic excitation
| Authors | H. de Riedmatten, J. Laurat, C. W. Chou, E. W. Schomburg, D. Felinto, H. J. Kimble |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0606249 |
| URL | https://arxiv.org/abs/quant-ph/0606249 |
| DOI | 10.1103/PhysRevLett.97.113603 |
| Journal | Phys. Rev. Lett. 97, 113603 (2006) |
Abstract
Violations of a Bell inequality are reported for an experiment where one of two entangled qubits is stored in a collective atomic memory for a user-defined time delay. The atomic qubit is found to preserve the violation of a Bell inequality for storage times up to 21 microseconds, 700 times longer than the duration of the excitation pulse that creates the entanglement. To address the question of the security of entanglement-based cryptography implemented with this system, an investigation of the Bell violation as a function of the cross-correlation between the generated nonclassical fields is reported, with saturation of the violation close to the maximum value allowed by quantum mechanics.
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"abstract": "Violations of a Bell inequality are reported for an experiment where one of\ntwo entangled qubits is stored in a collective atomic memory for a user-defined\ntime delay. The atomic qubit is found to preserve the violation of a Bell\ninequality for storage times up to 21 microseconds, 700 times longer than the\nduration of the excitation pulse that creates the entanglement. To address the\nquestion of the security of entanglement-based cryptography implemented with\nthis system, an investigation of the Bell violation as a function of the\ncross-correlation between the generated nonclassical fields is reported, with\nsaturation of the violation close to the maximum value allowed by quantum\nmechanics.",
"arxiv_id": "quant-ph/0606249",
"authors": [
"H. de Riedmatten",
"J. Laurat",
"C. W. Chou",
"E. W. Schomburg",
"D. Felinto",
"H. J. Kimble"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.97.113603",
"journal_ref": "Phys. Rev. Lett. 97, 113603 (2006)",
"title": "Direct measurement of decoherence for entanglement between a photon and stored atomic excitation",
"url": "https://arxiv.org/abs/quant-ph/0606249"
},
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