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In this paper, ordinary and amplitude-squared squeezing as well as Wignerfunctions of single-photon-added coherent state after postselected von Neumannmeasurements are investigated. The analytical results show that the von Neumanntype measurement which is characterized by post-selection and weak value cansignificantly change the squeezing feature of single-photon-added coherentstate. It is also found that the postselected measurement can increase thenonclassicality of the original state in strong measurement regimes. It isanticipated that this work could may provide an alternate and effective methodsto solve state optimization problems based on the postselected von Neumannmeasurement technique.

Studying the squeezing effect and phase space distribution of single-photon-added coherent state using postselected von Neumann measurement