  Recently, the nonlocal optimal probabilistic cloning (NLOPC) of two
non-orthogonal qubit states has been proposed [Phys. Rev. A 86, 052332 (2012)]
by means of an experimental setup based on a pair of twin photons in a
maximally entangled state. Here we study the performance of the NLOPC protocol
when implemented via a partially entangled state. We show that the errors
introduced by the use of partial entanglement can be undone by applying a
quantum state discrimination process. Since quantum state discrimination is a
probabilistic process the correction succeeds with a certain probability but
produces perfect clones. We also studied how to modified the setup to produce
local copies.
