Comment on "Direct counterfactual transmission of a quantum state"
Lev Vaidman
TL;DR
This paper critically examines a quantum state transmission protocol, highlighting that its claim of counterfactuality is unsubstantiated due to unresolved issues with transmitting bit 0.
Contribution
It provides a critical analysis questioning the validity of the original protocol's claim of counterfactual quantum state transmission.
Findings
Counterfactuality of transmitting bit 0 is not established
The claim of counterfactual quantum state transmission is unfounded
Highlights the need for rigorous validation of counterfactual protocols
Abstract
The protocol for counterfactual transmission of a qubit [Li et al., Phys. Rev. A 92, 052315 (2015)] relies on the counterfactuality of transmissions of bit 1 and of bit 0. Since counterfactuality of transmission of bit 0 is not established, the claim of counterfactuality of transmission of a quantum state is not founded.
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