dorsal/arxiv
View SchemaTomographic reconstruction of the single-photon Fock state by high-frequency homodyne detection
| Authors | Alessandro Zavatta, Silvia Viciani, Marco Bellini |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0406090 |
| URL | https://arxiv.org/abs/quant-ph/0406090 |
| DOI | 10.1103/PhysRevA.70.053821 |
| Journal | Phys. Rev. A 70, 053821 (2004) |
Abstract
A single-photon Fock state has been generated by means of conditional preparation from a two-photon state emitted in the process of spontaneous parametric down-conversion. A recently developed high-frequency homodyne tomography technique has been used to completely characterize the Fock state by means of a pulse-to-pulse analysis of the detectors' difference photocurrent. The density matrix elements of the generated state have been retrieved with a final detection efficiency of about 57%. A comparison has been performed between the phase-averaged tomographic reconstructions of the Wigner function as obtained from the measured density-matrix elements and from a direct Abel transform of the homodyne data. The ability of our system to work at the full repetition rate of the pulsed laser (82 MHz) substantially simplifies the detection scheme, allowing for more ``exotic'' quantum states to be generated and analyzed.
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"abstract": "A single-photon Fock state has been generated by means of conditional\npreparation from a two-photon state emitted in the process of spontaneous\nparametric down-conversion. A recently developed high-frequency homodyne\ntomography technique has been used to completely characterize the Fock state by\nmeans of a pulse-to-pulse analysis of the detectors\u0027 difference photocurrent.\nThe density matrix elements of the generated state have been retrieved with a\nfinal detection efficiency of about 57%. A comparison has been performed\nbetween the phase-averaged tomographic reconstructions of the Wigner function\nas obtained from the measured density-matrix elements and from a direct Abel\ntransform of the homodyne data. The ability of our system to work at the full\nrepetition rate of the pulsed laser (82 MHz) substantially simplifies the\ndetection scheme, allowing for more ``exotic\u0027\u0027 quantum states to be generated\nand analyzed.",
"arxiv_id": "quant-ph/0406090",
"authors": [
"Alessandro Zavatta",
"Silvia Viciani",
"Marco Bellini"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.70.053821",
"journal_ref": "Phys. Rev. A 70, 053821 (2004)",
"title": "Tomographic reconstruction of the single-photon Fock state by high-frequency homodyne detection",
"url": "https://arxiv.org/abs/quant-ph/0406090"
},
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