  We consider non-Gaussian states generated by photon subtraction (PS) and
photon addition (PA) on two-mode squeezed coherent (TMSC) states, as resource
states for continuous variable (CV) quantum teleportation (QT). To this end, we
derive the Wigner characteristic function for the family of photon subtracted
and photon added TMSC states, which is then utilized to calculate the fidelity
of teleporting a single mode coherent state and a squeezed vacuum state. The
analysis shows that while symmetric PS enhances the fidelity of QT in an
extensive range of squeezing, asymmetric PS enhances the performance marginally
and only in the low squeezing regime. The addition operations on the other hand
are less useful, symmetric three-PA leads to a marginal improvement while the
other addition operations are useless. We have considered the actual
experimental setup for PS and PA operations and computed their success
probabilities which should be kept in mind while advocating the use of these
operations. We could compute the fidelity of QT for a broad range of states
because we analytically derived the Wigner characteristic function for these
family of states which we think will be useful for various other applications
of these families of states.
