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"Counterfactual" quantum protocols

  • arXiv (Cornell University)
  • Cornell University
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Abstract

The counterfactuality of recently proposed protocols is analyzed. A definition of `counterfactuality' is offered and it is argued that an interaction-free measurement of the presence of an opaque object can be named `counterfactual', while proposed "counterfactual" measurements of the absence of such objects are not counterfactual. The quantum key distribution protocols which rely only on measurements of the presence of the object are counterfactual, but quantum direct communication protocols are not. Therefore, the name `counterfactual' is not appropriate for recent "counterfactual" protocols which transfer quantum states by quantum direct communication.

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Publication details

DOI
10.48550/arxiv.1605.02181
OpenAlex
W2949100797
Document type
preprint
Language
EN
Source
arXiv (Cornell University)
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