Quantum computers based on electron spins controlled by ultrafast off-resonant single optical pulses.
Quantum computers based on electron spins controlled by ultrafast off-resonant single optical pulses.
复制标题
DOI：
10.1103/physrevlett.99.040501
复制
发表时间：
2006-10
影响因子：
8.6
通讯作者：
S. Clark;K. Fu;T. Ladd;Y. Yamamoto
中科院分区：
文献类型：
--
作者：
S. Clark;K. Fu;T. Ladd;Y. Yamamoto
我们描述了一个快速量子计算机的基础上，光学控制的电子自旋的带电量子点耦合到微腔。该方案使用宽带光脉冲来旋转电子自旋并向系统提供时钟信号。非定域双量子比特门是利用电子自旋在沿沿着波导传播的激光脉冲上引起的相移来实现的。该方案的数值模拟表明，高保真单量子比特和双量子比特门的操作时间与逆塞曼频率相当。
We describe a fast quantum computer based on optically controlled electron spins in charged quantum dots that are coupled to microcavities. This scheme uses broadband optical pulses to rotate electron spins and provide the clock signal to the system. Nonlocal two-qubit gates are performed by phase shifts induced by electron spins on laser pulses propagating along a shared waveguide. Numerical simulations of this scheme demonstrate high-fidelity single-qubit and two-qubit gates with operation times comparable to the inverse Zeeman frequency.