Spin squeezing in nonlinear spin-coherent states
Xiaoguang Wang · Journal of Optics B Quantum and Semiclassical Optics · 2001
We introduce the nonlinear spin-coherent state (SCS) via its ladder operator formalism and propose a type of nonlinear SCS by the nonlinear time evolution of the SCS. By a new version of spectroscopic squeezing criteria we study the spin squeezing in both the SCS and the nonlinear SCS. The results show that the SCS is not squeezed in the x , y and z directions, and the nonlinear SCS may be squeezed in the x and y directions.