论文标题
通过两光子过渡的速量柜上纠缠大门的提议
Proposal for entangling gates on fluxonium qubits via a two-photon transition
论文作者
论文摘要
我们提出了一个微波活化的纠缠大门家族，上面有两个电容耦合的磁盘量。微波脉冲以$ | 00 \ rangle的一半频率接近的频率应用于任一量子，| 11 \ rangle $ transition诱导了两光鼠的拉比振荡，并且由于强大的磁盘量强的闭环性，而计算子空间以外的泄漏可忽略不计。通过调整驱动频率，振幅和持续时间，我们获得了局部等同的栅极族，例如$ \ sqrt {\ rm swap} $ - 喜欢和受控的相位门。脉冲持续时间在100 ns的脉冲持续时间内，可以将门误调节以下$ 10^{ - 4} $，而无需过多的电路参数匹配。鉴于Fuxonium相干时间可以超过1 ms，因此对于大型量子处理器而言，我们的栅极方案有望。
We propose a family of microwave-activated entangling gates on two capacitively coupled fluxonium qubits. A microwave pulse applied to either qubit at a frequency near the half-frequency of the $|00\rangle - |11\rangle$ transition induces two-photon Rabi oscillations with a negligible leakage outside the computational subspace, owing to the strong anharmonicity of fluxoniums. By adjusting the drive frequency, amplitude, and duration, we obtain the gate family that is locally equivalent to the fermionic-simulation gates such as $\sqrt{\rm SWAP}$-like and controlled-phase gates. The gate error can be tuned below $10^{-4}$ for a pulse duration under 100 ns without excessive circuit parameter matching. Given that the fluxonium coherence time can exceed 1 ms, our gate scheme is promising for large-scale quantum processors.
