Entanglement, which-way measurements, and a quantum erasure

Abstract

We present a didactical approach to the which-way experiment and the counterintuitive effect of the quantum erasure for one-particle quantum interferences. The fundamental concept of entanglement plays a central role and highlights the complementarity between quantum interference and knowledge of which path is followed by the particle.

5 pages, 4 figures; with some clarifications and added references

Cited by in corpus (6)

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• The Delayed-Choice Quantum Eraser Leaves No Choice
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• Quantum key distribution based on the quantum eraser