  Recent theoretical investigations on tomographic entanglement indicators have
showcased the advantages of the tomographic approach in the context of
continuous-variable (CV), spin and hybrid quantum systems. Direct estimation of
entanglement using experimental data from the IBM quantum computing platform
and NMR experiments have also been carried out in earlier work. A similar
investigation in the context of CV systems is necessary to fully assess the
utility of our tomographic approach. In this paper, we highlight the advantages
of our approach in the context of experiments reported in the literature on two
CV systems, namely, entangled Talbot carpets and biphoton frequency combs. We
use the tomographic entanglement indicator to assess the extent of entanglement
between a pair of Talbot carpets and demonstrate that this provides a simpler
and more direct procedure compared to the one suggested in the experiment. We
also establish that the tomograms corresponding to the two biphoton frequency
combs carry clear entanglement signatures that distinguish between the two
states.
