---
OA_type: closed access
_id: '575'
abstract:
- lang: eng
  text: We present the first demonstration of Jozsa's "counterfactual computation",
    using an optical Grover's search algorithm. We put the algorithm in a superposition
    of 'running' and 'not-running', obtaining information even though the algorithm
    does not run.
alternative_title:
- QELS
article_processing_charge: No
author:
- first_name: Onur
  full_name: Hosten, Onur
  id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
  last_name: Hosten
  orcid: 0000-0002-2031-204X
- first_name: Matthew
  full_name: Rakher, Matthew
  last_name: Rakher
- first_name: Julio
  full_name: Barreiro, Julio
  last_name: Barreiro
- first_name: Nicholas
  full_name: Peters, Nicholas
  last_name: Peters
- first_name: Paul
  full_name: Kwiat, Paul
  last_name: Kwiat
citation:
  ama: 'Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. Counterfactual quantum
    computation. In: <i>2005 Quantum Electronics and Laser Science Conference</i>.
    Vol 1. IEEE; 2005:365-367. doi:<a href="https://doi.org/ 10.1109/QELS.2005.1548783">
    10.1109/QELS.2005.1548783</a>'
  apa: 'Hosten, O., Rakher, M., Barreiro, J., Peters, N., &#38; Kwiat, P. (2005).
    Counterfactual quantum computation. In <i>2005 Quantum Electronics and Laser Science
    Conference</i> (Vol. 1, pp. 365–367). Baltimore, MD, United States: IEEE. <a href="https://doi.org/
    10.1109/QELS.2005.1548783">https://doi.org/ 10.1109/QELS.2005.1548783</a>'
  chicago: Hosten, Onur, Matthew Rakher, Julio Barreiro, Nicholas Peters, and Paul
    Kwiat. “Counterfactual Quantum Computation.” In <i>2005 Quantum Electronics and
    Laser Science Conference</i>, 1:365–67. IEEE, 2005. <a href="https://doi.org/
    10.1109/QELS.2005.1548783">https://doi.org/ 10.1109/QELS.2005.1548783</a>.
  ieee: O. Hosten, M. Rakher, J. Barreiro, N. Peters, and P. Kwiat, “Counterfactual
    quantum computation,” in <i>2005 Quantum Electronics and Laser Science Conference</i>,
    Baltimore, MD, United States, 2005, vol. 1, pp. 365–367.
  ista: 'Hosten O, Rakher M, Barreiro J, Peters N, Kwiat P. 2005. Counterfactual quantum
    computation. 2005 Quantum Electronics and Laser Science Conference. QELS: Quantum
    Electronics and Laser Science, QELS, vol. 1, 365–367.'
  mla: Hosten, Onur, et al. “Counterfactual Quantum Computation.” <i>2005 Quantum
    Electronics and Laser Science Conference</i>, vol. 1, IEEE, 2005, pp. 365–67,
    doi:<a href="https://doi.org/ 10.1109/QELS.2005.1548783"> 10.1109/QELS.2005.1548783</a>.
  short: O. Hosten, M. Rakher, J. Barreiro, N. Peters, P. Kwiat, in:, 2005 Quantum
    Electronics and Laser Science Conference, IEEE, 2005, pp. 365–367.
conference:
  end_date: 2005-05-27
  location: Baltimore, MD, United States
  name: 'QELS: Quantum Electronics and Laser Science'
  start_date: 2005-05-22
date_created: 2018-12-11T11:47:16Z
date_published: 2005-01-01T00:00:00Z
date_updated: 2026-08-20T11:33:59Z
day: '01'
doi: ' 10.1109/QELS.2005.1548783'
extern: '1'
intvolume: '         1'
language:
- iso: eng
month: '01'
oa_version: None
page: 365 - 367
publication: 2005 Quantum Electronics and Laser Science Conference
publication_identifier:
  isbn:
  - '1557527962'
publication_status: published
publisher: IEEE
publist_id: '7237'
status: public
title: Counterfactual quantum computation
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 1
year: '2005'
...