Multipartite Entanglement Of Noninertial Frames In The Open System

Quantum information theory emergence just a few years, but the new science has developed very quickly and show advanced significance and broad application prospect. Quantum entanglement has been a popular area of research. It plays a central role as an important resource in quantum computation, teleportation, dense coding and cryptography. Since the environment is unavoidable, there have been many meaningful works on the dynamics of entanglement in two qubits, interacting with different kinds of environments and we now find some important features of the entanglement such as the entanglement sudden death and birth. However, we have to consider multipartite entanglement in many real quantum information tasks. And there is no doubt that the effect of environment should be reckon in in large scale quantum information processing.On the other hand, therelativistic quantum information has been a focus of research over recent years for both conceptual and experimental reasons. Many study of entanglement between inertial and noninertial observers have showed that how the Unruh or Hawking effect will influence the degree of entanglement. How-ever, most of these work focused on the study of quantum information in bipartite systems and only one of the subsystems accelerated. Recently, the tripartite en-tanglement of scalar filed and dirac field between noninertial frames were studied by Mi-Ra Hwang et al. and Jieci Wang et al. They showed that the tripartite en-tanglement decreases with increase of the acceleration but different from bipartite entanglement when one observer moves with an infinite acceleration. And all the two-tangles equal to zero when one or two obser-vers accelerated for GHZ state, which is exactly the same as the two-tangles obtained in the inertial frame.The tripartite entanglement of a3-qubit fermionic system under the amplitude damping channel and in depolarizing noise when two subsystems accelerated are investigated. Unlike the case of two-qubit system in which sudden death occur easily, here it turns out to be very interesting that the one-tangles never occur entanglement sudden death for any acceleration even all the subsystems under the environment for two-accelerated observers. The acceleration and environment can both destroy the symmetry between the subsystems, but the effect of environment is much stronger than that of acceleration. A entanglement rebound process has been founded when p>0.75in depolarizing noise, and the bigger the acceleration is the smaller this process become.