Quantum computation with graphene nanoribbon
Quantum computation with graphene nanoribbon
复制标题
石墨烯纳米带的量子计算
DOI：
10.1088/1367-2630/11/12/123005
复制
发表时间：
2009-12-03
影响因子：
3.3
通讯作者：
Guo, Guang-Can
中科院分区：
文献类型：
--
作者：
Guo, Guo-Ping;Lin, Zhi-Rong;Guo, Guang-Can
提出了一种在石墨烯纳米结构中实现量子计算的方案。结果表明，电子或空穴可以自然地定位在每个Z形结构的GNR序列的Z字形区域，而不使用限制的栅极。在这样的GNR中形成一维石墨烯量子点链，其中电子或空穴自旋可以用作量子位。相邻量子位之间的耦合相互作用被发现是永远在线的海森堡类型。通过利用bang-bang控制策略和消相干子空间编码方法，证明了利用现有技术可以实现通用量子门。
We propose a scheme to implement quantum computation in graphene nanoribbon (GNR). It is shown that an electron or hole can be naturally localized in each zigzag region for a GNR with a sequence of Z-shaped structures, without using confined gates. A one-dimensional graphene quantum dot chain is formed in such a GNR, where an electron or hole spin can be used as a qubit. The coupling interaction between neighboring qubits is found to be of the always-on Heisenberg type. By exploiting the bang–bang control strategy and the decoherence-free subspaces encoding method, universal quantum gates are argued to be realizable with the present techniques.