Counterfactual quantum erasure: spooky action without entanglement
Hatim Salih
TL;DR
This paper introduces a novel quantum eraser that allows remote erasure of which-path information, restoring interference without shared entanglement or photon transfer, highlighting unusual quantum phenomena.
Contribution
It presents the first combination of quantum erasure and counterfactuality, demonstrating interference restoration without entanglement or photon transmission.
Findings
Remote erasure restores interference patterns.
No entanglement needed between parties.
Photon never leaves Alice's lab during erasure.
Abstract
We combine the eyebrow-raising quantum phenomena of erasure and counterfactuality for the first time, proposing a simple yet unusual quantum eraser: A distant Bob can decide to erase which-path information from Alice's photon, dramatically restoring interference, without previously-shared entanglement, and without Alice's photon ever leaving her lab.
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