Effects of postselected von Neumann measurement on nonclassicality of single-photon-added coherent state
School of Physics and Electronic Engineering, Xinjiang Normal University, 830054, Urumqi, Xinjiang, China
Accepted: 30 January 2021
Published online: 16 February 2021
The effects of postselected von Neumann measurement on nonclassicality of single-photon-added coherent state (SPACS) are studied. Explicit expressions and analytical results of photon statistics including photon number distribution and Mandel factor, and the squeezing parameter of the field quadrature of SPACS after postselected von Neumann measurement are investigated. The results showed that the nonclassicality of SPACS after measurement changed dramatically than the initial state. The measurement let SPACS possess more strong sub-Poissonian photon statistics in some definite coupling strength regimes and large weak values, which accompanied by low postselection probabilities.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021