  Traditional ghost imaging experiments exploit position correlations between
correlated states of light. These correlations occur directly in spontaneous
parametric down-conversion (SPDC), and in such a scenario, the two-photon state
used for ghost imaging is symmetric. Here we perform ghost imaging using an
anti-symmetric state, engineering the two-photon state symmetry by means of
Hong-Ou-Mandel interference. We use both symmetric and anti-symmetric states
and show that the ghost imaging setup configuration results in object-image
rotations depending on the state selected. Further, the object and imaging arms
employ spatial light modulators for the all-digital control of the projections,
being able to dynamically change the measuring technique and the spatial
properties of the states under study. Finally, we provide a detailed theory
that explains the reported observations.
