  Solution of free particle quantum master equation with spatial decoherence
can be unravelled into stochastic quantum trajectories in many ways. The first
example, published in 1985, proposed a piecewise deterministic jump process for
the wave function. While alternative unravellings, diffusive ones in
particular, proved to be tractable analytically, the jump process 1985, also
called orthojump, allows for few analytic results, it needs numeric methods as
well. Here we prove that, similarly to diffusive unravellings, it is localizing
the quantum state.
