Universal quantum computation with quantum-dot cellular automata in decoherence-free subspace

نویسندگان

Zhen-Yu Xu

Mang Feng

Wei-Min Zhang

چکیده

We investigate the possibility to have electron-pairs in decoherence-free subspace (DFS), by means of the quantum-dot cellular automata (QCA) and single-spin rotations, to carry out a high-fidelity and deterministic universal quantum computation. We show that our QCA device with electrons tunneling in two dimensions is very suitable for DFS encoding, and argue that our design favors a scalable quantum computation robust to collective dephasing errors.

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