We propose a novel architecture for scalable quantum computation based on quantum actuated decoherence-free (DF) qubits. Each qubit is encoded by the DF subspace of a nuclear spin pair and has long coherence time. A nitrogen-vacancy center in diamond is chosen as the quantum actuator to realize initialization, readout and universal control of DF qubits with fidelities higher than 99%. It reduces the challenge of classical interfaces from controlling and observing complex quantum systems down to a simple quantum actuator. Our scheme also provides a novel way to handle complex quantum systems.
@article{arxiv.1612.08567,
title = {Scalable quantum computation based on quantum actuated nuclear-spin decoherence-free qubits},
author = {Xing Rong and Lihong Dong and Jianpei Geng and Fazhan Shi and Zhaokai Li and Changkui Duan and Jiangfeng Du},
journal= {arXiv preprint arXiv:1612.08567},
year = {2017}
}