Cited by 310Quantum Information and CryptographyMechanical and Optical ResonatorsQuantum Mechanics and Applications

Quantum non-demolition detection of single microwave photons in a circuit

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Johnson, B. R., Reed, M. D., Houck, A. A., Schuster, D. I., Bishop, Lev S., Ginossar, E., Gambetta, J. M., DiCarlo, L. +3 more·2010·Nature Physics

Abstract

Quantum non-demolition (QND) measurements interrogate a quantum state without disturbing it. A QND scheme that uses a superconducting circuit to investigate microwave photons trapped in a cavity is now shown. The measurement answers the question: are there exactly N photons in the cavity?

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Crossref · 10.1038/nphys1710

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  • The irreversible detection of the emitted photons, either in cavity 1 or 2, erases the which-way information, thereby entangling the particles.

    “The irreversible detection of the emitted photons, either in cavity 1 or 2 (for instance as in Ref. 48), erases the “which way” information, thereby entangling the particles.”

    From Coherent coupling of a trapped electron to a distant superconducting microwave cavity (2020) · cites this paper as [48]

    The paper describes detecting single microwave photons in a storage cavity, so it supports the citation as an example of cavity-photon detection. But its description of the CNOT-based interrogation and repeated-measurement experiment (sections labelled Abstract; page unavailable) emphasizes that detection is quantum non-demolition. It does not describe detection of emitted photons from either of two cavities, erasure of which-way information, or consequent particle entanglement. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

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Authors
Johnson, B. R., Reed, M. D., Houck, A. A., Schuster, D. I., Bishop, L. S., Ginossar, E., Gambetta, J. M., DiCarlo, L., Frunzio, L., Girvin, S. M., & Schoelkopf, R. J.
Affiliations
  • Yale University (US)
  • Princeton University (US)
  • University of Waterloo (CA)
Corresponding author
Schoelkopf, R. J.
Venue
Nature Physics
Published
2010-06-20
Volume
6
Issue
9
Pages
663-667
ISSN
  • 1745-2473 (ISSN-L)
  • 1745-2481
OpenAlex
W2036797065
Cited by
309
References
20
Citations by year
2026: 5 · 2025: 16 · 2024: 14 · 2023: 44 · 2022: 12 · 2021: 20 · 2020: 25 · 2019: 12 · 2018: 19 · 2017: 15 · 2016: 23 · 2015: 17 · 2014: 18 · 2013: 19 · 2012: 26
FWCI
23.02
Type
journal article
Language
en
Open access
Locations
  • Nature Physics (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Surrey Research Insight Open Access (The University of Surrey) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (0603369, 0653073)
  • Canadian Institute for Advanced Research
  • Mitacs
  • Natural Sciences and Engineering Research Council of Canada
  • Division of Materials Research
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Mechanical and Optical Resonators
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Keywords
quantum non-demolition measurement, single-photon detection, microwave photons, superconducting circuits, microwave cavity, photon number measurement, quantum measurement, quantum computing

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