TY - JOUR
T1 - "Counterfactual" quantum protocols
AU - Vaidman, L.
N1 - Publisher Copyright:
© 2016 World Scientific Publishing Company.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - The counterfactuality of recently proposed protocols is analyzed. A definition of "counterfactuality" is offered and it is argued that an interaction-free measurement (IFM) 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.
AB - The counterfactuality of recently proposed protocols is analyzed. A definition of "counterfactuality" is offered and it is argued that an interaction-free measurement (IFM) 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.
KW - Interaction-free measurement
KW - counterfactual communication
KW - quantum communication
KW - quantum measurement
UR - http://www.scopus.com/inward/record.url?scp=84969921163&partnerID=8YFLogxK
U2 - 10.1142/S0219749916400128
DO - 10.1142/S0219749916400128
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AN - SCOPUS:84969921163
SN - 0219-7499
VL - 14
JO - International Journal of Quantum Information
JF - International Journal of Quantum Information
IS - 4
M1 - 1640012
ER -