Correlation and squeezing of hybrid signals with or without Autler–Townes splitting in Pr 3+ :YSO crystal

We provide the first report of switching between the intensity noise correlation and anti-correlation using Autler–Townes splitting, through controlling the initial and dressing phases of laser fields to generate multi-order fluorescence. Evolution of increasing classical correlation along with the degree of intensity-difference squeezing is analyzed against decreasing power. In addition, we also investigate the line shape of correlations on the basis of decay and decoherence rates of the multi-order fluorescence induced by dressing fields. These findings are applicable in classical and non-classical information processing.