Quantum Teleportation and Superdense Coding via W-Class States

According to the protocol of Agrawal et al., we propose a cavity QEDscheme for realization of teleportation and dense coding. Instead of using EPRstates and GHZ states, our scheme is more insensitive to the loss of oneparticle by using a W-class state as a quantum channel. Besides, our schemeis immune to thermal field, and does not require the cavity to remain in thevacuum state throughout the procedure.