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We propose a scheme for implementing the deterministic quantum information splitting (QIS) of an arbitrary three-atom state in cavity QED. In the scheme, a four-atom χ-state and a three-atom GHZ state are used as quantum channel. In comparison with the QIS scheme by using the same quantum channel (Luo and Deng in Quantum. Inf. Process. 12:773, ), our scheme does not involve joint Bell-state measurements, one only needs to perform the single-atom measurements. Our scheme is not sensitive to both the cavity decay and the atom radiation, which is of importance in view of experiment. [ABSTRACT FROM AUTHOR]

We present a scheme for the generation of a genuine four-atom entangled state in Cavity QED. This state has many interesting entanglement properties and wide applications in quantum information processing and fundamental tests of quantum physics. Our scheme is insensitive to both the cavity decay and the thermal field. [ABSTRACT FROM AUTHOR]

We present an experimentally feasible scheme for implementing controlled dense coding through a genuine five-atom entangled state in cavity QED. The scheme is insensitive to both the cavity decay and the thermal field. In the scheme that four-atom entangled states can be exactly distinguished with detecting the atomic state, and the controlled dense coding can be realized in a simple way. [ABSTRACT FROM AUTHOR]