Quantum coherence of Gaussian states
Daniela Buono, Gaetano Nocerino, Giuseppe Petrillo, Gianpaolo Torre, Giuseppe Zonzo, Fabrizio Illuminati · arXiv (Cornell University) · 2016
We introduce a geometric quantification of quantum coherence in single-mode Gaussian states and we investigate the behavior of distance measures as functions of different physical parameters. In the case of squeezed thermal states, we observe that re-quantization yields an effect of noise-enhanced quantum coherence for increasing thermal photon number.