We study the dynamics of genuine multipartite entanglement for a system of four qubits. Using a computable entanglement monotone for multipartite systems, we investigate the as yet unexplored aspects of a cavity-reservoir system of qubits. For one specific initial state, we observe a sudden transition in the dynamics of genuine entanglement for the four qubits. This sudden change occurs only during a time window where neither cavity-cavity qubits nor reservoir-reservoir qubits are entangled. We show that the sudden change in dynamics of this specific state is extremely sensitive to white noise.
Publication Source (Journal or Book title)
Physical Review A - Atomic, Molecular, and Optical Physics
Ali, M., & Rau, A. (2014). Sudden change in dynamics of genuine multipartite entanglement of cavity-reservoir qubits. Physical Review A - Atomic, Molecular, and Optical Physics, 90 (4) https://doi.org/10.1103/PhysRevA.90.042330