Demonstration of an Optical Quantum Controlled-NOT Gate without Path Interference
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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gate without any path interference, where the two interacting path interferometers of the original proposals have been replaced by three partially polarizing beam splitters with suitable polarization dependent transmittance and reflectance. The performance of the device is evaluated using a recently proposed method, 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.
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An even simpler set-up becomes possible with polarization encoding (Kiesel et al., 2005b; Langford et al., 2005; Okamoto et al., 2005) which in turn could be already applied, e.g., to observe cluster states for one-way quantum computing (Kiesel et al., 2005a).
“An even simpler set-up becomes possible with polarization encoding (Kiesel et al., 2005b;Langford et al., 2005;Okamoto et al., 2005) which in turn could be already applied, e.g., to observe cluster states for one-way quantum computing (see below, Kiesel et al., 2005a).”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Okamoto et al., 2005
The authors use a pair of compact optical gates, each operating on a dependent pair of photons, resulting in measured visibilities for both of V_r=98±2%.
“We use a pair of compact optical gates [8,9,10], Fig 2c),e), each operating on a dependent pair of photons, resulting in measured visibilities for both of V r =98±2%.”
From Experimental Demonstration of a Compiled Version of Shor’s Algorithm with Quantum Entanglement (2007) · cites this paper as [10]
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Self-citation
- Authors
- Okamoto, R., Hofmann, H. F., Takeuchi, S., & Sasaki, K.
- Affiliations
- Hokkaido University (JP)
- Hiroshima University (JP)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2005-11-18
- Volume
- 95
- Issue
- 21
- Pages
- 210506-210506
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2080971279
- Cited by
- 251
- References
- 19
- Citations by year
- 2026: 7 · 2025: 13 · 2024: 13 · 2023: 6 · 2022: 13 · 2021: 12 · 2020: 11 · 2019: 7 · 2018: 15 · 2017: 7 · 2016: 17 · 2015: 11 · 2014: 13 · 2013: 12 · 2012: 12
- FWCI
- 11.60
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Institutional Repositories DataBase (IRDB) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- Hokkaido University Collection of Scholarly and Academic Papers (Hokkaido University) (submittedVersion)
- Hiroshima University Institutional Repository (submittedVersion, other-oa)
- Hiroshima University Acedemic Information Repository (Hiroshima University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Japan Science and Technology Agency
- Core Research for Evolutional Science and Technology
- 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 Mechanics and Applications
- Keywords
- path interference, quantum gates
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