Deterministic teleportation of an arbitrary two-qubit state via a six-qubit cluster state

Since decoherence caused by some environment is always present in practice, the quantum channels usually exist in the form of non-maximally entangled states instead of maximally entangled states. We present an approach to deterministically teleport an arbitrary two-qubit state with a probabilistic quantum channel composed of a one-dimensional six-qubit cluster state. To avoid damaging the states to be teleported, the channel is modulated in advance, and Hadamard transformation and Bell state measurement are applied instead of six qubit von Neumann measurement. The scheme is flexible because the channel can be modulated either by the sender or by the receiver, and we may decide which party modulates the channel according to the distribution of available particle and gate operation resources. Furthermore, we provide different ways of redistributing qubits between the sender and the receiver, as well as alternative solutions of constructing the scheme. Finally, for general cases, we extend this scheme to deterministic teleportation of an arbitrary n-qubit state.