Fig. 3: Weak measurement tagging showing no weak trace from Bob’s mirrors at detector D0 or D1. | npj Quantum Information

Fig. 3: Weak measurement tagging showing no weak trace from Bob’s mirrors at detector D0 or D1.

From: The laws of physics do not prohibit counterfactual communication

Fig. 3

Fourier transform of position with respect to time, of light beam incident on detectors D0 (a), D1 (b) and D3 (c). D0 and D1 show the oscillation from Alice’s mirror (at 29Hz), but unlike D3 do not show the oscillations from Bob’s two mirrors (at 13Hz and 19Hz, with a second harmonic at 26Hz), proving via weak measurement that no light that goes to Bob’s mirrors ends up at either D0 or D1.

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