Amplitude-squared squeezing of Schrödinger cat states via postselected von Neumann measurement Nuerbiya Aishan, Taximaiti Yusufu and Yusuf Turek Eur. Phys. J. Plus, 137 2 (2022) 221 Published online: 10 February 2022 DOI: 10.1140/epjp/s13360-022-02441-z