Counterfactual quantum erasure: Spooky action without entanglement

Hatim Salih*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

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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 laboratory.
Original languageEnglish
Article number171250
Number of pages5
JournalRoyal Society Open Science
Issue number2
Early online date14 Feb 2018
Publication statusPublished - Feb 2018


  • Counterfactual communication
  • Entanglement
  • Interaction-free measurement
  • Quantum erasure
  • Quantum interference
  • Zeno effect

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