TL;DR
This paper argues that the Afshar experiment does not violate Bohr's Principle of Complementarity because its interpretation relies on a flawed assumption about retroactive determination of which-way information.
Contribution
It clarifies the conceptual misunderstanding in the Afshar experiment and defends the consistency of wave-particle duality with quantum principles.
Findings
The Afshar experiment does not demonstrate a violation of complementarity.
Retroactive determination of which-way information is flawed.
Wave-particle duality remains consistent with quantum mechanics.
Abstract
The assertion that an experiment by Afshar et al. demonstrates violation of Bohr's Principle of Complementarity is based on the faulty assumption that which-way information in a double-slit interference experiment can be retroactively determined from a future measurement.
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