  We introduce a class of bipartite entangled continuous variable states that
are positive under partial transposition operation, i.e., PPT bound entangled.
These states are based on realistic preparation procedures in optical systems,
being thus a feasible option to generate and observe genuinely bipartite bound
entanglement in high precision experiments. One fundamental step in our scheme
is to perform a non-Gaussian operation over a single-mode Gaussian state; this
deGaussification procedure is achieved through a modified single-photon
addition, which is a procedure that has currently being investigated in diverse
optical setups. Although dependent on a single-photon detection in a idler
channel, the preparation can be made unconditional after a calibration of the
apparatus. The detection and proof of bound entanglement is made by means of
the Range Criterion, theory of Hankel operators and Gerschgorin Disk s
perturbation theorems.
