Bright and Dark States of Light: The quantum Origin of Classical Interference
arXiv:2112.05512 · doi:10.1103/PhysRevLett.134.133603
Abstract
Classical theory asserts that several electromagnetic waves cannot interact with matter if they interfere destructively to zero, whereas quantum mechanics predicts a nontrivial light-matter dynamics even when the average electric field vanishes. Here we show that in quantum optics classical interference emerges from collective bright and dark states of light, \textit{i.e.}, entangled superpositions of multi-mode photon-number states. This makes it possible to explain wave interference using the particle description of light and the superposition principle for linear systems.
arXiv comment5 pages, 1 figures
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