dorsal/arxiv
View SchemaUniversal ultrabright source of entangled photon states: generation and tomographic analysis of Werner states and of Maximally Entangled Mixed States
| Authors | G. Di Nepi, F. De Martini, M. Barbieri, P. Mataloni |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0307204 |
| URL | https://arxiv.org/abs/quant-ph/0307204 |
Abstract
A novel ultrabright parametric source of polarization entangled photon pairs with striking spatial characteristics is reported. The distribution of the output electromagnetic k-modes excited by Spontaneous Parametris Down Conversion and coupled to the output detectors can be very broad. It could coincide with the full set of phase-matched excited modes, at least in principle. In this case a relevant conditional quasi-pure output state should be realized. By these (approximate) states realized over a full Entanglement-Ring output distribution, the non local properties of the generated entanglement has been tested by standard Bell measurements and by Ou-Mandel interferometry. A novel ''mode-patchwork'' technique based on the quantum superposition principle is adopted to synthesize in a straightforward and reliable way any kind of mixed-states, of large conceptual and technological interest in modern Quantum Information. Tunable Werner states and Maximally Entangled Mixed States (MEMS) have indeed been created by the new technique and investigated by quantum tomography. A thorough study of the entropic and nonlocal properties of these states has been undertaken experimentally and theoretically, by a unifying variational approach.
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"abstract": "A novel ultrabright parametric source of polarization entangled photon pairs\nwith striking spatial characteristics is reported. The distribution of the\noutput electromagnetic k-modes excited by Spontaneous Parametris Down\nConversion and coupled to the output detectors can be very broad. It could\ncoincide with the full set of phase-matched excited modes, at least in\nprinciple. In this case a relevant conditional quasi-pure output state should\nbe realized. By these (approximate) states realized over a full\nEntanglement-Ring output distribution, the non local properties of the\ngenerated entanglement has been tested by standard Bell measurements and by\nOu-Mandel interferometry. A novel \u0027\u0027mode-patchwork\u0027\u0027 technique based on the\nquantum superposition principle is adopted to synthesize in a straightforward\nand reliable way any kind of mixed-states, of large conceptual and\ntechnological interest in modern Quantum Information. Tunable Werner states and\nMaximally Entangled Mixed States (MEMS) have indeed been created by the new\ntechnique and investigated by quantum tomography. A thorough study of the\nentropic and nonlocal properties of these states has been undertaken\nexperimentally and theoretically, by a unifying variational approach.",
"arxiv_id": "quant-ph/0307204",
"authors": [
"G. Di Nepi",
"F. De Martini",
"M. Barbieri",
"P. Mataloni"
],
"categories": [
"quant-ph"
],
"title": "Universal ultrabright source of entangled photon states: generation and tomographic analysis of Werner states and of Maximally Entangled Mixed States",
"url": "https://arxiv.org/abs/quant-ph/0307204"
},
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