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Suitability versus fidelity for rating single-photon guns

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George M. Hockney, Pieter Kok, Jonathan P. Dowling

Quantum Physics · Submitted 28 Jun 2002

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We show that the fidelity, under the standard definitions is not sufficient to assess quantum sources, and we propose a new measure of suitability that necessarily depends on the application for the source.

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arXiv IDquant-ph/0206198 (version 2)
Pith IDVCTTO2TO, Pith's permanent record of this paper and its review
CitationGeorge M. Hockney, Jonathan P. Dowling, Pieter Kok. "Suitability versus fidelity for rating single-photon guns." arXiv:quant-ph/0206198 (2002). https://pith.science/paper/VCTTO2TO
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,803 input tokens.

What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.31 · human participants 0.02 · controlled comparison 0.06 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.25 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; .

The creation of specified quantum states is important for most, if not all, applications in quantum computation and communication. The quality of the state preparation is therefore an essential ingredient in any assessment of a quantum-state gun. We show that the fidelity, under the standard definitions is not sufficient to assess quantum sources, and we propose a new measure of suitability that necessarily depends on the application for the source. We consider the performance of single-photon guns in the context of quantum key distribution (QKD) and linear optical quantum computation. Single-photon sources for QKD need radically different properties than sources for quantum computing. Furthermore, the suitability for single-photon guns is discussed explicitly in terms of experimentally accessible criteria.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 The creation of specified quantum states is important for most, if not all, applications in quantum computation and communication. background 1.00 0.04 0.02 asserted 0.87
s1 The quality of the state preparation is therefore an essential ingredient in any assessment of a quantum-state gun. background 1.00 0.06 0.04 asserted 1.00
s2 We show that the fidelity, under the standard definitions is not sufficient to assess quantum sources, and we propose a new measure of suitability that necessarily depends on the application for the source. contribution 0.96 0.94 0.92 asserted 1.00
s3 We consider the performance of single-photon guns in the context of quantum key distribution (QKD) and linear optical quantum computation. contribution 0.79 0.61 0.04 asserted 0.81
s4 Single-photon sources for QKD need radically different properties than sources for quantum computing. result 0.50 0.31 0.10 asserted 1.00
s5 Furthermore, the suitability for single-photon guns is discussed explicitly in terms of experimentally accessible criteria. contribution 0.83 0.75 0.07 asserted 0.96

What kind of paper the classifier reports this is: method or tool 0.81 · evidence from argument 0.72.

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  • C citations
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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

The creation of specified quantum states is important for most, if not all, applications in quantum computation and communication. The quality of the state preparation is therefore an essential ingredient in any assessment of a quantum-state gun. We show that the fidelity, under the standard definitions is not sufficient to assess quantum sources, and we propose a new measure of suitability that necessarily depends on the application for the source. We consider the performance of single-photon guns in the context of quantum key distribution (QKD) and linear optical quantum computation. Single-photon sources for QKD need radically different properties than sources for quantum computing. Furthermore, the suitability for single-photon guns is discussed explicitly in terms of experimentally accessible criteria.

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