Improving two - qubit state teleportation affected by amplitude damping noise based on choosing appropriate quantum channel

Abstract: We consider two qubit teleportation via quantum channel affected by amplitude damping noise. Addressing the same problem, X. Hu, Y. Gu, Q. Gong and G. Guo [Phys. Rev. A 81, 054302, (2010)] recently showed that in presence of noise, subjecting more qubits in quantum channel to amplitude damping can increase the fidelity of teleportation protocol. However, in this paper, by making some adjustments on quantum channel, we obtain teleportation fidelity which is even higher than one in the case of X. Hu et al. Moreover, our strategy is simpler than quantum distillation and compared to using weak measurement, it is deterministic. Furthermore, explicit analysis of fidelity is provided, we show that in general, choosing appropriate quantum channel enhances the ability of teleportation better and negates the fact that more amplitude damping noise more quality.