How Good Must Single Photon Sources and Detectors Be for Efficient Linear Optical Quantum Computation?
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We present a scheme for linear optical quantum computation that is highly robust to imperfect single photon sources and inefficient detectors. In particular we show that if the product of the detector efficiency with the source efficiency is greater than 2/3, then efficient linear optical quantum computation is possible. This high threshold is achieved within the cluster state paradigm for quantum computation.
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Ralph et al. (2005) and Varnava et al. (2006, 2008) designed loss-tolerant quantum computer schemes within the circuit-model and one-way model; the latter scheme can tolerate an overall optical loss, including source inefficiency and collection loss, up to 33%.
“For photon loss alone, Ralph et al. (2005) and Varnava et al. (2006) and(2008) have designed loss-tolerant quantum computer schemes within the circuit-model and one-way model; the latter scheme can tolerate an overall optical loss, including source inefficiency and collection loss, up to an impressive 33%.”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Varnava et al. (2008)
With non-unit efficiencies η_S and η_D of photon creation and detection being the only imperfections, the threshold η_S η_D > 2/3 was established.
“With non-unit efficiencies η S and η D of photon creation and detection being the only imperfections, the very high threshold of η S η D > 2 / 3 was established 72 .”
From Measurement-based quantum computation (2009) · cites this paper as [72]
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- Authors
- Varnava, M., Browne, D. E., & Rudolph, T.
- Affiliations
- Imperial College London (GB)
- ORCID
- Rudolph, Terry
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2008-02-12
- Volume
- 100
- Issue
- 6
- Pages
- 060502-060502
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2052992792
- Cited by
- 248
- References
- 28
- Citations by year
- 2026: 13 · 2025: 18 · 2024: 31 · 2023: 23 · 2022: 12 · 2021: 18 · 2020: 11 · 2019: 12 · 2018: 12 · 2017: 15 · 2016: 11 · 2015: 10 · 2014: 15 · 2013: 5 · 2012: 8
- FWCI
- 17.45
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- UCL Discovery (University College London) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Engineering and Physical Sciences Research Council (GR/S51226/01)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
- Keywords
- linear optical quantum computation, single-photon sources, single-photon detectors, detector efficiency, source efficiency, cluster states
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