Linking Measures for Macroscopic Quantum States via Photon-Spin Mapping
arXiv:1405.0051 · doi:10.1016/j.optcom.2014.07.017
Abstract
We review and compare several measures that identify quantum states that are "macroscopically quantum". These measures were initially formulated either for photonic systems or spin ensembles. Here, we compare them through a simple model which maps photonic states to spin ensembles. On the one hand, we reveal problems for some spin measures to handle correctly photonic states that typically are considered to be macroscopically quantum. On the other hand, we find significant similarities between other measures even though they were differently motivated.
12 pages, 1 figure; published in a special issue of Optics Communications: "Macroscopic quantumness: theory and applications in optical sciences"; v2: minor changes
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