当前位置:
X-MOL 学术
›
Phys. Rev. X
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fast Logic with Slow Qubits: Microwave-Activated Controlled-Z Gate on Low-Frequency Fluxoniums
Physical Review X ( IF 12.5 ) Pub Date : 2021-05-03 , DOI: 10.1103/physrevx.11.021026 Quentin Ficheux , Long B. Nguyen , Aaron Somoroff , Haonan Xiong , Konstantin N. Nesterov , Maxim G. Vavilov , Vladimir E. Manucharyan
Physical Review X ( IF 12.5 ) Pub Date : 2021-05-03 , DOI: 10.1103/physrevx.11.021026 Quentin Ficheux , Long B. Nguyen , Aaron Somoroff , Haonan Xiong , Konstantin N. Nesterov , Maxim G. Vavilov , Vladimir E. Manucharyan
We demonstrate a controlled-Z gate between capacitively coupled fluxonium qubits with transition frequencies 72.3 and 136.3 MHz. The gate is activated by a 61.6-ns-long pulse at a frequency between noncomputational transitions and , during which the qubits complete only four and eight Larmor periods, respectively. The measured gate error of is limited by decoherence in the noncomputational subspace, which will likely improve in the next-generation devices. Although our qubits are about 50 times slower than transmons, the two-qubit gate is faster than microwave-activated gates on transmons, and the gate error is on par with the lowest reported. Architectural advantages of low-frequency fluxoniums include long qubit coherence time, weak hybridization in the computational subspace, suppressed residual -coupling rate (here 46 kHz), and the absence of either excessive parameter-matching or complex pulse-shaping requirements.
中文翻译:
慢量子位的快速逻辑:低频通量的微波激活的受控Z门
我们演示了电容性耦合通量量子位之间的受控Z门,其跃迁频率为72.3和136.3 MHz。该门由61.6 ns长的脉冲以非计算转换之间的频率激活 和 ,在此期间,量子位分别仅完成四个和八个拉莫尔周期。测得的门极误差受到非计算子空间中去相干性的限制,这可能会在下一代设备中得到改善。尽管我们的量子比特比转基因慢大约50倍,但两个量子比特的门比转基因上的微波激活门快,并且门误差与报道的最低值相当。低频通量子的结构优势包括长量子位相干时间,计算子空间中的弱杂交,抑制残差-耦合速率(此处为46 kHz),并且没有过多的参数匹配或复杂的脉冲整形要求。
更新日期:2021-05-03
中文翻译:
慢量子位的快速逻辑:低频通量的微波激活的受控Z门
我们演示了电容性耦合通量量子位之间的受控Z门,其跃迁频率为72.3和136.3 MHz。该门由61.6 ns长的脉冲以非计算转换之间的频率激活 和 ,在此期间,量子位分别仅完成四个和八个拉莫尔周期。测得的门极误差受到非计算子空间中去相干性的限制,这可能会在下一代设备中得到改善。尽管我们的量子比特比转基因慢大约50倍,但两个量子比特的门比转基因上的微波激活门快,并且门误差与报道的最低值相当。低频通量子的结构优势包括长量子位相干时间,计算子空间中的弱杂交,抑制残差-耦合速率(此处为46 kHz),并且没有过多的参数匹配或复杂的脉冲整形要求。