Quantum computing with spins in solids
摘要
The ability to perform high-precision one- and two-qubit operations is sufficient for universal quantum computation. For the Loss-DiVincenzo proposal to use single electron spins confned to quantum dots as qubits, it is therefore sufficient to analyze only single- and coupled double-dot structures, since the strong Heisenberg exchange coupling between spins in this proposal falls off exponentially with distance and long-ranged dipolar coupling mechanisms can be made significantly weaker. This scalability of the Loss-DiVincenzo design is both a practical necessity for eventual applications of multi-qubit quantum computing and a great conceptual advantage, making analysis of the relevant components relatively transparent and systematic. We review the Loss-DiVincenzo proposal for quantum-dot-confned electron spin qubits, and survey the current state of experiment and theory regarding the relevant single- and double- quantum dots, with a brief look at some related alternative schemes for quantum computing.
引用
@article{arxiv.cond-mat/0606550,
title = {Quantum computing with spins in solids},
author = {W. A. Coish and Daniel Loss},
journal= {arXiv preprint arXiv:cond-mat/0606550},
year = {2007}
}
备注
39 pages, 7 figures, Contribution to the Handbook of Magnetism and Advanced Magnetic Materials, vol. 5, Wiley