设计鲁棒酉门：应用于级联复合脉冲
Designing Robust Unitary Gates: Application to Concatenated Composite Pulse
摘要：
我们提出了一个简单的形式化设计酉门对给定的系统误差鲁棒。这种形式主义概括了我们以前的观察[Y。Kondo和M. Bando，J. Phys. Soc. Jpn. 80，054002（2011）]，在一些复合门中消失动态相位对于抑制幅度误差是必要的。通过采用我们的形式主义，我们自然地得到一个新的复合酉门，它可以被看作是两个已知的复合酉操作的级联。与现有的复合门相比，所得到的酉门在更宽的误差强度范围内具有高保真度。
英文摘要：
We propose a simple formalism to design unitary gates robust against given systematic errors. This formalism generalizes our previous observation [Y. Kondo and M. Bando, J. Phys. Soc. Jpn. 80, 054002 (2011)] that vanishing dynamical phase in some composite gates is essential to suppress amplitude errors. By employing our formalism, we naturally derive a new composite unitary gate which can be seen as a concatenation of two known composite unitary operations. The obtained unitary gate has high fidelity over a wider range of the error strengths compared to existing composite gates.
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