  Phase collapse and revival for Bose-Einstein condensates is a nonlinear
phenomena appearing due atomic collisions. While it has been observed in a
general setting involving many modes, for one-mode condensates its occurrence
is forbidden by the particle number superselection rule (SSR), which arises
because there is no phase reference available. We consider a single mode atomic
Bose-Einstein condensate interacting with an off-resonant optical probe field.
We show that the condensate phase revival time is dependent on the atom-light
interaction, allowing optical control on the atomic collapse and revival
dynamics. Incoherent effects over the condensate phase are included by
considering a continuous photo-detection over the probe field. We consider
conditioned and unconditioned photo-counting events and verify that no extra
control upon the condensate is achieved by the probe photo-detection, while
further inference of the atomic system statistics is allowed leading to a
useful test of the SSR on particle number and its imposition on the kind of
physical condensate state.
