dorsal/arxiv
View SchemaA conditional-phase switch at the single-photon level
| Authors | K. J. Resch, J. S. Lundeen, A. M. Steinberg |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0205109 |
| URL | https://arxiv.org/abs/quant-ph/0205109 |
| DOI | 10.1103/PhysRevLett.89.037904 |
| Journal | Physical Review Letters 89, 037904 (2002) |
Abstract
We present an experimental realization of a two-photon conditional-phase switch, related to the ``$c$-$\phi $'' gate of quantum computation. This gate relies on quantum interference between photon pairs, generating entanglement between two optical modes through the process of spontaneous parametric down-conversion (SPDC). The interference effect serves to enhance the effective nonlinearity by many orders of magnitude, so it is significant at the quantum (single-photon) level. By adjusting the relative optical phase between the classical pump for SPDC and the pair of input modes, one can impress a large phase shift on one beam which depends on the presence or absence of a single photon in a control mode.
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"abstract": "We present an experimental realization of a two-photon conditional-phase\nswitch, related to the ``$c$-$\\phi $\u0027\u0027 gate of quantum computation. This gate\nrelies on quantum interference between photon pairs, generating entanglement\nbetween two optical modes through the process of spontaneous parametric\ndown-conversion (SPDC). The interference effect serves to enhance the effective\nnonlinearity by many orders of magnitude, so it is significant at the quantum\n(single-photon) level. By adjusting the relative optical phase between the\nclassical pump for SPDC and the pair of input modes, one can impress a large\nphase shift on one beam which depends on the presence or absence of a single\nphoton in a control mode.",
"arxiv_id": "quant-ph/0205109",
"authors": [
"K. J. Resch",
"J. S. Lundeen",
"A. M. Steinberg"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.89.037904",
"journal_ref": "Physical Review Letters 89, 037904 (2002)",
"title": "A conditional-phase switch at the single-photon level",
"url": "https://arxiv.org/abs/quant-ph/0205109"
},
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