论文标题
有效的两量脉冲序列超出了CNOT
Efficient Two-Qubit Pulse Sequences Beyond CNOT
论文作者
论文摘要
我们以任意角度作用在三旋速度Qubits上设计有效的控制栅栏，以进行仅交换量子计算。 给出了两个脉冲序列构造。 第一个是由精确cnot门的有效方旺祖序序列的分析推导而动机。 此推导在此处简要综述，是基于将简短的交换脉冲升高到纠缠的两个Qubit Gate的基础上。 为了超越CNOT，我们将相似的高程应用于修改的短序列，该序列由掉期和一个任意持续时间组成。 这会导致两量序列进行任意角度的受控旋转门。 第二个施工简化了前面建立的一类任意CPHASE门。 这两种结构均基于构建两量序列的特殊属性，这些序列具有特殊的特性，这些特性使构造的每个步骤在分析上可以进行。
We design efficient controlled-rotation gates with arbitrary angle acting on three-spin encoded qubits for exchange-only quantum computation. Two pulse sequence constructions are given. The first is motivated by an analytic derivation of the efficient Fong-Wandzura sequence for an exact CNOT gate. This derivation, briefly reviewed here, is based on elevating short sequences of SWAP pulses to an entangling two-qubit gate. To go beyond CNOT, we apply a similar elevation to a modified short sequence consisting of SWAPs and one pulse of arbitrary duration. This results in two-qubit sequences that carry out controlled-rotation gates of arbitrary angle. The second construction streamlines a class of arbitrary CPHASE gates established earlier. Both constructions are based on building two-qubit sequences out of subsequences with special properties that render each step of the construction analytically tractable.
