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Detecting nonclassical properties that do not allow classical interpretationof photoelectric counting events is one of the crucial themes in quantumoptics. Observation of individual nonclassical effects for a single-mode field,however, has been so far practically confined to sub-Poissonian statistics andquadrature squeezing. We show that a photon-added classical (coherent orthermal) state exhibits generalized nonclassical features in all orders ofcreation and annihilation operators, thereby becoming a promising candidate forstudying higher-order nonclassical effects. Our analysis demonstratesrobustness of these effects against nonideal experimental conditions.

Demonstrating higher-order nonclassical effects by photon-added classical states: Realistic schemes