Optical attenuation without absorption
Links to Fileshttps://arxiv.org/abs/1903.02041
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Type of Work7 pages
journal articles preprints
Citation of Original PublicationI.C. Nodurft, R.A. Brewster, T.B. Pittman, J.D. Franson , Optical attenuation without absorption, Quantum Physics, 2019, https://arxiv.org/abs/1903.02041
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We consider a coherent state of light propagating through an ensemble of two-level atoms where all the atoms are initially in their ground state. In ordinary absorption, the transition of atoms to their excited state along with the absorption of a photon will remove energy from the beam and attenuate the signal. Here we show that post-selecting on those cases in which none of the atoms made a transition to the excited state can give even more attenuation than would normally occur due to absorption. The same process can also produce amplification when there is a sufficiently strong interaction between the photons and the atoms.