A scheme of teleportation of two unknown quantum states via quantum computation is proposed. The comparison with the former proposals shows that our scheme is more in tune with the original teleportation proposal and the efficiency is higher. The teleportation of an unknown entangled state is also discussed.
This paper uses a special two-particle entangled state as a quantum channel to achieve invisibility unknown arbitrary two-particle quantum state teleportation. It makes contrast with Yuan, who makes use of χ-type entangled states to achieve two any unknown quantum state teleportation scheme. The scheme uses two sub-channels and Bell-based measurements, as well as special unitary operation successfully completing message teleportation. The program uses fewer resources,and the obtained probability of an original information is 1.
Quantum teleportation with additional a priori information about the input state achieves higher fidelity than teleportation of a completely unknown state. However, perfect teleporation of two nonorthogonal input states requires the same amount of entanglement as perfect teleportation of an unknown state, namely one ebit. We analyze how well two-state teleportation can be achieved using every degree of pure-state entanglement. We find the highest fidelity of ``teleportation'' that can be achieved with only classical communication but no shared entanglement. A two-state telecloning scheme is constructed.