论文标题
通过优化的动力解耦来抑制加速几何相位门中的经典噪声
Suppressing classical noise in the accelerated geometric phase gate by optimized dynamical decoupling
论文作者
论文摘要
在量子计算的情况下，几何相位门因其固有的容错性扰动而变得越来越有吸引力。随着绝热循环进化，浆果阶段似乎实现了几何变化。但是，由于系统误差，在连贯性的时间尺度上执行尽可能多的量子门仍然是不便的瓶颈。在这里，我们提出了一个基于浆果阶段，无过渡驾驶和动态解耦的加速绝热量子门。在控制噪声或不完美的情况下，它可以与高速相协调。我们在流行的高斯噪声频谱下优化了时域中的动力耦合序列，这是反相反的二次幂律。
In the quantum-computation scenario, geometric phase-gates are becoming increasingly attractive for their intrinsic fault tolerance to disturbance. With an adiabatic cyclic evolution, Berry phase appears to realize a geometric transformation. Performing the quantum gates as many as possible within the timescale of coherence, however, remains an inconvenient bottleneck due to the systematic errors. Here we propose an accelerated adiabatic quantum gate based on the Berry phase, the transitionless driving, and the dynamical decoupling. It reconciles a high fidelity with a high speed in the presence of control noise or imperfection. We optimize the dynamical-decoupling sequence in the time domain under a popular Gaussian noise spectrum following the inversely quadratic power-law.
