---
res:
  bibo_abstract:
  - 'The logic underlying the coherent nature of quantum information processing often
    deviates from intuitive reasoning, leading to surprising effects. Counterfactual
    computation constitutes a striking example: the potential outcome of a quantum
    computation can be inferred, even if the computer is not run 1. Relying on similar
    arguments to interaction-free measurements 2 (or quantum interrogation3), counterfactual
    computation is accomplished by putting the computer in a superposition of ''running''
    and ''not running'' states, and then interfering the two histories. Conditional
    on the as-yet-unknown outcome of the computation, it is sometimes possible to
    counterfactually infer information about the solution. Here we demonstrate counterfactual
    computation, implementing Grover''s search algorithm with an all-optical approach4.
    It was believed that the overall probability of such counterfactual inference
    is intrinsically limited1,5, so that it could not perform better on average than
    random guesses. However, using a novel ''chained'' version of the quantum Zeno
    effect6, we show how to boost the counterfactual inference probability to unity,
    thereby beating the random guessing limit. Our methods are general and apply to
    any physical system, as illustrated by a discussion of trapped-ion systems. Finally,
    we briefly show that, in certain circumstances, counterfactual computation can
    eliminate errors induced by decoherence. @eng'
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Onur
      foaf_name: Hosten, Onur
      foaf_surname: Hosten
      foaf_workInfoHomepage: http://www.librecat.org/personId=4C02D85E-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0002-2031-204X
  - foaf_Person:
      foaf_givenName: Matthew
      foaf_name: Rakher, Matthew
      foaf_surname: Rakher
  - foaf_Person:
      foaf_givenName: Julio
      foaf_name: Barreiro, Julio
      foaf_surname: Barreiro
  - foaf_Person:
      foaf_givenName: Nicholas
      foaf_name: Peters, Nicholas
      foaf_surname: Peters
  - foaf_Person:
      foaf_givenName: Paul
      foaf_name: Kwiat, Paul
      foaf_surname: Kwiat
  bibo_doi: 10.1038/nature04523
  bibo_issue: '7079'
  bibo_volume: 439
  dct_date: 2006^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0028-0836
  - http://id.crossref.org/issn/1476-4687
  dct_language: eng
  dct_publisher: Nature Publishing Group@
  dct_title: Counterfactual quantum computation through quantum interrogation@
  fabio_hasPubmedId: '16495993'
...