sComment on 'Puri's criterion and higher-order squeezing'
Xia Yunjie, Yan Ke-zhu, Kong Xianghe · Physical Review A · 1997
The result that Lynch and Mavromatis [Phys. Rev. A 52, 55 (1995)] obtained by Puri's definition of squeezing has no relation to Hong and Mandel"s higher-order squeezing [Phys. Rev. Lett. 54, 323 (1985)]. We also point out that, for an electromagnetic field, the nonclassicality of the squeezed state defined according to Puri's general uncertainty relation is not preserved.