dorsal/arxiv
View SchemaDemonstration of an optical quantum controlled-NOT gate without path interference
| Authors | Ryo Okamoto, Holger F. Hofmann, Shigeki Takeuchi, Keiji Sasaki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0506263 |
| URL | https://arxiv.org/abs/quant-ph/0506263 |
| DOI | 10.1103/PhysRevLett.95.210506 |
Abstract
We report the first experimental demonstration of an optical quantum controlled-NOT gate without any path interference, where the two interacting path interferometers of the original proposals (Phys. Rev. A {\bf 66}, 024308 (2001), Phys. Rev. A {\bf 65}, 012314 (2002)) have been replaced by three partially polarizing beam splitters with suitable polarization dependent transmittances and reflectances. The performance of the device is evaluated using a recently proposed method (Phys. Rev. Lett. {\bf 94}, 160504 (2005)), by which the quantum process fidelity and the entanglement capability can be estimated from the 32 measurement results of two classical truth tables, significantly less than the 256 measurement results required for full quantum tomography.
{
"annotation_id": "1fbe67df-900d-4138-ac15-5b23c76259b6",
"date_created": "2026-03-02T18:02:17.267000Z",
"date_modified": "2026-03-02T18:02:17.267000Z",
"file_hash": "aefb848db3444b1059b158b0af12f4ca5de4b28886216e072b20917a3c8f9413",
"private": false,
"record": {
"abstract": "We report the first experimental demonstration of an optical quantum\ncontrolled-NOT gate without any path interference, where the two interacting\npath interferometers of the original proposals (Phys. Rev. A {\\bf 66}, 024308\n(2001), Phys. Rev. A {\\bf 65}, 012314 (2002)) have been replaced by three\npartially polarizing beam splitters with suitable polarization dependent\ntransmittances and reflectances. The performance of the device is evaluated\nusing a recently proposed method (Phys. Rev. Lett. {\\bf 94}, 160504 (2005)), by\nwhich the quantum process fidelity and the entanglement capability can be\nestimated from the 32 measurement results of two classical truth tables,\nsignificantly less than the 256 measurement results required for full quantum\ntomography.",
"arxiv_id": "quant-ph/0506263",
"authors": [
"Ryo Okamoto",
"Holger F. Hofmann",
"Shigeki Takeuchi",
"Keiji Sasaki"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.95.210506",
"title": "Demonstration of an optical quantum controlled-NOT gate without path interference",
"url": "https://arxiv.org/abs/quant-ph/0506263"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "61296933-f876-4c81-bbf9-3b35b73c4ba0",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}