dorsal/arxiv
View SchemaDispersion cancellation and non-classical noise reduction for large photon-number states
| Authors | M. J. Fitch, J. D. Franson |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0201075 |
| URL | https://arxiv.org/abs/quant-ph/0201075 |
| DOI | 10.1103/PhysRevA.65.053809 |
| Journal | Phys. Rev. A 65 (2002) 053809 |
Abstract
Nonlocal dispersion cancellation is generalized to frequency-entangled states with large photon number N. We show that the same entangled states can simultaneously exhibit a factor of 1/sqrt(N) reduction in noise below the classical shot noise limit in precise timing applications, as was previously suggested by Giovannetti, Lloyd and Maccone (Nature v412 (2001) p417). The quantum-mechanical noise reduction can be destroyed by a relatively small amount of uncompensated dispersion and entangled states of this kind have larger timing uncertainties than the corresponding classical states in that case. Similar results were obtained for correlated states, anti-correlated states, and frequency-entangled coherent states, which shows that these effects are a fundamental result of entanglement.
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"abstract": "Nonlocal dispersion cancellation is generalized to frequency-entangled states\nwith large photon number N. We show that the same entangled states can\nsimultaneously exhibit a factor of 1/sqrt(N) reduction in noise below the\nclassical shot noise limit in precise timing applications, as was previously\nsuggested by Giovannetti, Lloyd and Maccone (Nature v412 (2001) p417). The\nquantum-mechanical noise reduction can be destroyed by a relatively small\namount of uncompensated dispersion and entangled states of this kind have\nlarger timing uncertainties than the corresponding classical states in that\ncase. Similar results were obtained for correlated states, anti-correlated\nstates, and frequency-entangled coherent states, which shows that these effects\nare a fundamental result of entanglement.",
"arxiv_id": "quant-ph/0201075",
"authors": [
"M. J. Fitch",
"J. D. Franson"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.65.053809",
"journal_ref": "Phys. Rev. A 65 (2002) 053809",
"title": "Dispersion cancellation and non-classical noise reduction for large photon-number states",
"url": "https://arxiv.org/abs/quant-ph/0201075"
},
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