Comment on ‘From counterportation to local wormholes’

Justin Dressel, Gregory Reznik*, Lev Vaidman

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review


Hatim Salih discovered a method for transferring a quantum state with no particles present in the transmission channel, which he named counterportation. Recently (Salih 2023 Quantum Sci. Technol. 8 025016), he presented a feasible procedure for its implementation. The modification of the protocol by Aharonov and Vaidman, adopted by Salih, justifies the claim that no photons were present in the transmission channel during counterportation. We argue, however, that there is an error in this paper. The analysis of a simplified protocol, which questions the validity of the two-state vector formalism description of the photon presence in the communication channel, is incorrect.

Original languageEnglish
Article number018001
JournalQuantum Science and Technology
Issue number1
StatePublished - Jan 2024


FundersFunder number
National Science Foundation1915015
Army Research OfficeW911NF-18-1-0178
United States-Israel Binational Science Foundation735/18


    • counterfactual
    • counterportation
    • two-state vector formalism
    • weak values


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