dorsal/arxiv
View SchemaSingle-photon quantum nondemolition detectors constructed with linear optics and projective measurements
| Authors | Pieter Kok, Hwang Lee, Jonathan P. Dowling |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0202046 |
| URL | https://arxiv.org/abs/quant-ph/0202046 |
| DOI | 10.1103/PhysRevA.66.063814 |
| Journal | Phys. Rev. A, Vol. 66, 063814 (2002) |
Abstract
Optical quantum nondemolition devices can provide essential tools for quantum information processing. Here, we describe several optical interferometers that signal the presence of a single photon in a particular input state without destroying it. We discuss both entanglement-assisted and non-entanglement-assisted interferometers, with ideal and realistic detectors. We found that existing detectors with 88% quantum efficiency and single-photon resolution can yield output fidelities of up to 89%, depending on the input state. Furthermore, we construct expanded protocols to perform QND detections of single photons that leave the polarization invariant. For detectors with 88% efficiency we found polarization-preserving output fidelities of up to 98.5%.
{
"annotation_id": "e3e16af4-7a5b-4db1-b19d-f0dc32259bd9",
"date_created": "2026-03-02T18:01:49.267000Z",
"date_modified": "2026-03-02T18:01:49.267000Z",
"file_hash": "1659157fa5d77941416d526c8bed586ae7520750da343f659e490ba195983031",
"private": false,
"record": {
"abstract": "Optical quantum nondemolition devices can provide essential tools for quantum\ninformation processing. Here, we describe several optical interferometers that\nsignal the presence of a single photon in a particular input state without\ndestroying it. We discuss both entanglement-assisted and\nnon-entanglement-assisted interferometers, with ideal and realistic detectors.\nWe found that existing detectors with 88% quantum efficiency and single-photon\nresolution can yield output fidelities of up to 89%, depending on the input\nstate. Furthermore, we construct expanded protocols to perform QND detections\nof single photons that leave the polarization invariant. For detectors with 88%\nefficiency we found polarization-preserving output fidelities of up to 98.5%.",
"arxiv_id": "quant-ph/0202046",
"authors": [
"Pieter Kok",
"Hwang Lee",
"Jonathan P. Dowling"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.66.063814",
"journal_ref": "Phys. Rev. A, Vol. 66, 063814 (2002)",
"title": "Single-photon quantum nondemolition detectors constructed with linear optics and projective measurements",
"url": "https://arxiv.org/abs/quant-ph/0202046"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "2ed437fb-f974-4c90-ba38-aaeed7867823",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}