Processing quantum information in diamond
Processing quantum information in diamond
复制标题
DOI：
10.1088/0953-8984/18/21/s08
复制
发表时间：
2006-05-31
影响因子：
2.7
通讯作者：
Jelezko, F
中科院分区：
文献类型：
--
作者：
Wrachtrup, J;Jelezko, F
量子计算是一个有吸引力的多学科领域，在过去十年中成为实验和理论研究的焦点。在其他系统中，如陷阱中的离子和超导电路，基于固态的量子比特被认为是有希望用于量子硬件的首次实验测试的候选者。本文报道了利用金刚石点缺陷进行量子信息处理的最新进展。量子位被定义为单自旋态（电子或核）。这允许探索长相干时间（在低温下核自旋长达数秒）。此外，基态和激发态之间的光学跃迁允许自旋自由度与电磁场状态的耦合。这种耦合可以通过光子的自旋选择性散射获得自旋态读出。这也允许使用自旋态作为飞行量子比特（光子）的稳健存储器。
Quantum computing is an attractive and multidisciplinary field, which became a focus for experimental and theoretical research during the last decade. Among other systems, such as ions in traps and superconducting circuits, solid state based qubits are considered to be promising candidates for use in first experimental tests of quantum hardware. Here we report recent progress in quantum information processing with point defects in diamond. Qubits are defined as single spin states (electron or nuclear). This allows exploration of long coherence times (up to seconds for nuclear spins at cryogenic temperatures). In addition, the optical transition between ground and excited electronic states allows coupling of spin degrees of freedom to the state of the electromagnetic field. Such coupling gives access to spin state read-out via spin-selective scattering of photons. This also allows the use of spin states as robust memory for flying qubits (photons).