Entanglement, which-way measurements, and a quantum erasure
Christian Ferrari, Bernd Braunecker
TL;DR
This paper explains the concepts of entanglement, which-way measurements, and quantum erasure in one-particle interference experiments, emphasizing their fundamental role in quantum complementarity.
Contribution
It provides a didactical approach to understanding quantum erasure and the role of entanglement in one-particle interference experiments.
Findings
Entanglement is central to quantum interference phenomena.
Quantum erasure can restore interference by removing which-way information.
Complementarity between interference and path knowledge is fundamental.
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.
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