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The quantumness of Dirac particles for quantized fields in a dilatonic black hole is estimated by means of quantum channel. A general Bloch vector representation of quantum channel in black hole spacetimes beyond single mode approximation is developed. The nonclassicality of Dirac particles can be measured by the minimization of quantum coherence over all orthonormal basis sets. The quantumness of...
Colors and chemicals are the most important cues for butterflies to localize mating partners and food. In this study, we used artificial flowers with different colors and plastic butterfly wing mimics to separate the impact of colors from other cues on foraging and courtship of the butterfly Papilio maackii. We found that males relied more on visual cues during foraging and courtship, but females...