  The problem of bound entanglement detection is a challenging aspect of
quantum information theory for higher dimensional systems. Here, we propose an
indecomposable positive map for two-qutrit systems, which is shown to generate
a class of positive partial transposed (PPT) states. A corresponding witness
operator is constructed and shown to be weakly optimal and locally
implementable. Further, we perform a structural physical approximation of the
indecomposable map to make it a completely positive one, and find a new PPT
entangled state which is not detectable by certain other well-known
entanglement detection criteria.
