  Port-based teleportation (PBT) is a teleportation scheme such that the
teleported state appears in one of receiver's multiple output ports without any
correcting operation on the output port. In this paper, we make some remarks on
PBT. Those include the possibility of recoverable PBT (a hybrid protocol
between PBT and the standard teleportation scheme), the possibility of
port-based superdense coding (a dual protocol to PBT), and the fidelily upper
bound expected from the entanglement monogamy relation in asymmetric universal
cloning.
