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The laws of physics do not prohibit counterfactual communication

Physics

The laws of physics do not prohibit counterfactual communication

H. Salih, W. Mccutcheon, et al.

This research, conducted by Hatim Salih, Will McCutcheon, Jonte R. Hance, and John Rarity, presents a groundbreaking scheme demonstrating that counterfactual communication is possible, even involving post-selected quantum states. Through experimental validation with weak measurements and a conceptual framework of consistent histories, they achieve a remarkable fidelity approaching unity, challenging long-held assumptions in quantum communication.

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Playback language: English
Abstract
This paper challenges the conjecture that counterfactual communication is impossible, even for post-selected quantum states. The authors propose a counterfactual scheme where none of Alice's photons contributing to her information about Bob's message have interacted with Bob. They demonstrate this experimentally using weak measurements and conceptually using consistent histories, achieving a fidelity arbitrarily close to unity.
Publisher
npj Quantum Information
Published On
May 18, 2022
Authors
Hatim Salih, Will McCutcheon, Jonte R. Hance, John Rarity
Tags
counterfactual communication
quantum states
weak measurements
consistent histories
fidelity

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