Squeezing properties of a trapped ion in the running-wave laser beyond the Lamb--Dicke limit

Beyond the Lamb--Dicke limit, this paper investigates the squeezing properties of the trapped ion in the travelling-wave laser. It shows that the squeezing properties of the trapped ion in the travelling-wave laser are strongly affected by the sideband number k, the Lamb--Dicke parameter \eta and the initial average phonon number.