  Historically, two complementary approaches to optical quantum information
processing have been pursued: qubits and continuous-variables, each exploiting
either particle or wave nature of light. However, both approaches have pros and
cons. In recent years, there has been a significant progress in combining both
approaches with a view to realizing hybrid protocols that overcome the current
limitations. In this chapter, we first review the development of the two
approaches with a special focus on quantum teleportation and its applications.
We then introduce our recent research progress in realizing quantum
teleportation by a hybrid scheme, and mention its future applications to
universal and fault-tolerant quantum information processing.
