In this paper, we propose two physical schemes, which can teleport unknown atomic state from user A (Alice) to user B (Bob) using the W class state as quantum channel. The two schemes are all based on Cavity QED techniques. The fidelity of the teleported state in the two schemes is equal to 1.0,...

In this paper, we propose a theoretical entanglement concentration protocol for unknown triparticle W class states, and then the physical implementation of this proposal has also been presented in cavity QED. The general protocol is mainly based on the appropriate Bell state measurements. In the...

In this paper, we first propose a general entanglement distillation protocol for three-particle W class states, which can concentrate the W′ state (non-maximally entangled W state). The general protocol is mainly based on the unitary transformations on the auxiliary particles and the entangled...