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We have observed two-photon interference behind Youngpsilas double slit with unprecedented signal/noise ratiopsilas. We demonstrate the complementarity between quantum entanglement in the two-photon field and optical coherence in the projected one-photon field for three different types of illumination: far-field, near-field, and intermediate illumination.
We measure the effects of reservoir engineering on the decay of a coherent, many-body excitation in a BEC loaded into an optical lattice. We show both enhancement and suppression of decoherence vs. lattice depth.
Previous work on biphoton imaging configurations is recast in the more inclusive framework of Gaussian-state quantum fields. This formulation shows that biphoton image formation is classical, but not its image-to-background ratio.
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