Multipartite entanglement manipulation by inherent interactions

Abstract

We investigate entanglement dynamics in multipartite systems with various forms of the interaction Hamiltonians. Since the interaction Hamiltonian not controlled by any external apparatuses but inherent in the given quantum system enables the quantum system to evolve as desired without any artificial gatings, it keeps at a minimum level of decoherence in the physical realization of quantum information technology. We present four interesting and potentially useful cases of quantum dynamical evolutions with the XY model and the XYZ model Hamiltonians. The entanglement can be generated, distributed, and controlled by clever design of the interaction Hamiltonian of a quantum system.