发表机构
National Laboratory of Solid State Microstructures, School of Physics, Nanjing University; Shishan Laboratory, Suzhou Campus of Nanjing University; Jiangsu Key Laboratory of Quantum Information Science and Technology, Nanjing University; Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China; Hefei National Laboratory（南京大学固体微结构物理学院; 南京大学苏州校区石崑实验室; 南京大学江苏省量子信息科学与技术重点实验室; 中国科学技术大学量子信息与量子物理协同创新中心; 合肥国家实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对超导量子比特中快速激发转移引起的泄漏问题，提出参数化DRAG（PDRAG）方法，通过单频率命令实现一阶和二阶导数校正，在保持交换相互作用的同时显著抑制泄漏，实验显示泄漏降低达5个数量级。
AI 中文摘要
可编程交换相互作用支持超导电路中的量子门和多体模拟。然而，快速激发转移在弱非谐transmon中打开了两个泄漏通道，降低了门保真度，并将模拟动力学驱离编码态空间。我们引入了参数化绝热门导数去除（PDRAG）来抑制这两个通道，同时保持目标交换。它们的共轭结构决定了通过一个实频率命令实现的一阶和二阶导数校正。在$g/2\pi=100$ MHz下，校准的PDRAG在Duffing模拟中，相对于基础脉冲，在12.5--35 ns范围内实现了几何平均泄漏降低$5.27\times10^5$倍。在13 ns时，校准的全交换脉冲的端点泄漏达到$1.98\times10^{-7}$。将导数系数转移到电荷哈密顿量，在幅度和载波重新校准后，在12.5--22 ns范围内平均降低893倍。Floquet返回干涉和电荷诱导的能隙移动解释了校准和转移的增益，将紧凑脉冲设计与泄漏抑制的可编程相互作用联系起来。
英文摘要
Programmable exchange interactions support quantum gates and many-body simulation in superconducting circuits. Fast excitation transfer, however, opens two leakage pathways in weakly anharmonic transmons, degrading gates and driving simulated dynamics outside the encoded state space. We introduce parametric derivative removal by adiabatic gate (PDRAG) to suppress both pathways while preserving the target exchange. Their conjugate structure determines first- and second-derivative corrections implemented through one real frequency command. At $g/2π=100$ MHz, calibrated PDRAG achieves a geometric-mean leakage reduction of $5.27\times10^5$ relative to the base pulse across 12.5--35 ns in Duffing simulations. At 13 ns, endpoint leakage reaches $1.98\times10^{-7}$ for the calibrated full-exchange pulse. Transferring the derivative coefficients to a charge Hamiltonian gives a mean 893-fold reduction over 12.5--22 ns after amplitude and carrier recalibration. Floquet return interference and charge-induced gap shifts explain the calibration and transfer gains, connecting compact pulse design to leakage-suppressed programmable interactions.
