dorsal/arxiv
View SchemaProjection Measurement of the Maximally Entangled N-Photon State for a Demonstration of N-Photon de Broglie Wavelength
| Authors | F. W. Sun, Z. Y. Ou, G. C. Guo |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0511189 |
| URL | https://arxiv.org/abs/quant-ph/0511189 |
| DOI | 10.1103/PhysRevA.73.023808 |
Abstract
We construct a projection measurement process for the maximally entangled N-photon state (the NOON-state) with only linear optical elements and photodetectors. This measurement process will give null result for any N-photon state that is orthogonal to the NOON state. We examine the projection process in more detail for N=4 by applying it to a four-photon state from type-II parametric down-conversion. This demonstrates an orthogonal projection measurement with a null result. This null result corresponds to a dip in a generalized Hong-Ou-Mandel interferometer for four photons. We find that the depth of the dip in this arrangement can be used to distinguish a genuine entangled four-photon state from two separate pairs of photons. We next apply the NOON state projection measurement to a four-photon superposition state from two perpendicularly oriented type-I parametric down-conversion processes. A successful NOON state projection is demonstrated with the appearance of the four-photon de Broglie wavelength in the interference fringe pattern.
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"abstract": "We construct a projection measurement process for the maximally entangled\nN-photon state (the NOON-state) with only linear optical elements and\nphotodetectors. This measurement process will give null result for any N-photon\nstate that is orthogonal to the NOON state. We examine the projection process\nin more detail for N=4 by applying it to a four-photon state from type-II\nparametric down-conversion. This demonstrates an orthogonal projection\nmeasurement with a null result. This null result corresponds to a dip in a\ngeneralized Hong-Ou-Mandel interferometer for four photons. We find that the\ndepth of the dip in this arrangement can be used to distinguish a genuine\nentangled four-photon state from two separate pairs of photons. We next apply\nthe NOON state projection measurement to a four-photon superposition state from\ntwo perpendicularly oriented type-I parametric down-conversion processes. A\nsuccessful NOON state projection is demonstrated with the appearance of the\nfour-photon de Broglie wavelength in the interference fringe pattern.",
"arxiv_id": "quant-ph/0511189",
"authors": [
"F. W. Sun",
"Z. Y. Ou",
"G. C. Guo"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.023808",
"title": "Projection Measurement of the Maximally Entangled N-Photon State for a Demonstration of N-Photon de Broglie Wavelength",
"url": "https://arxiv.org/abs/quant-ph/0511189"
},
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