  It has been discovered that open quantum walks diffusively distribute in
space, since they were introduced in 2012. Indeed, some limit distributions
have been demonstrated and most of them are described by Gaussian
distributions. We operate an open quantum walk on $\mathbb{Z}=\left\{0, \pm 1,
\pm 2,\ldots\right\}$ with parameterized operations in this paper, and study
its 1st and 2nd moments so that we find its standard deviation. The standard
deviation tells us whether the open quantum walker shows diffusive or ballistic
behavior, which results in a phase transition of the walker.
