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Postselected von Neumann measurement characterized by postselection and weakvalue has been found potential applications in quantum metrology and, solvedplenty of fundamental problems in quantum theory. As an application of this newmeasurement technique in quantum optics, its effects on the features ofsingle-mode radiation fields such as coherent state, squeezed vacuum state andSchrodinger cat sate are investigated by considering full-order effects ofunitary evolution. The results show that the conditional probabilities offinding photons, second-order correlation functions, Q-factors and squeezingeffects of those states after postselected measurement significantly changedcompared with corresponding initial pointer states, respectively.

Effects of Postselected von Neumann Measurement on the Properties of Single-Mode Radiation Fields