The potential of electron-nuclear spin interactions for use in quantum information processing

Recent experiments have demonstrated that an ensemble of spin polarized electrons can transfer its spin polarization to the spin of the host atomic nuclei in a “spin-friendly” semiconductor like gallium arsenide (GaAs). In this paper, we analyze this process in terms of its efficiency for using natural nuclear spin in a solid state quantum computer. Among the appealing features of the proposed design is the potential to mate it to existing memory technology. We propose a realizable and scalable model of such a device based on growth-implanted quantum dots in a III-V semiconductor matrix and analyze the feasibility of transferring spin polarized information to such a system, keeping it stored in the system and processing it.