Physics – Quantum Physics
Scientific paper
2002-04-02
J. Opt. B: Quantum Semiclass. Opt., volume 5, pages 85-94 (2003)
Physics
Quantum Physics
18 pages, 4 figures, revised for clarity, typos corrrected
Scientific paper
10.1088/1464-4266/5/1/312
We consider a fully quantized model of spontaneous emission, scattering, and absorption, and study propagation of a single photon from an emitting atom to a detector atom both with and without an intervening scatterer. We find an exact quantum analog to the classical complex analytic signal of an electromagnetic wave scattered by a medium of charged oscillators. This quantum signal exhibits classical phase delays. We define a time of detection which, in the appropriate limits, exactly matches the predictions of a classically defined delay for light propagating through a medium of charged oscillators. The fully quantized model provides a simple, unambiguous, and causal interpretation of delays that seemingly imply speeds greater than c in the region of anomalous dispersion.
Ligare Martin
Purdy Thomas
Taylor Daniel R.
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