Signatures of non-locality in the first-order coherence of the scattered light
arXiv:quant-ph/0703109 · doi:10.1134/S1054660X0707002X
Abstract
The spatial coherence of an atomic wavepacket can be detected in the scattered photons, even when the center-of-mass motion is in the quantum coherent superposition of two distant, non-overlapping wave packets. Spatial coherence manifests itself in the power spectrum of the emitted photons, whose spectral components can exhibit interference fringes as a function of the emission angle. The contrast and the phase of this interference pattern provide information about the quantum state of the center of mass of the scattering atom.
5 pages, one figure, submitted to Laser Physics, special issue in memory of Herbert Walther