标题： 基于系统性 Magnus 方法的量子动力学中泄漏和非绝热误差抑制策略 显示英文标题

标题： Systematic Magnus-based approach for suppressing leakage and non-adiabatic errors in quantum dynamics

摘要： 我们提出了一种系统的、微扰的方法来校正量子门以抑制将目标系统带出选定子空间的误差。 该方法解决了绝热演化和状态制备中的通用非绝热误差问题，以及由于与不期望的状态发生虚假耦合而产生的通用泄漏误差。 该方法基于马格纳斯展开：通过校正控制脉冲，我们修改初始给定的、不完美的酉变换的马格纳斯展开，从而使所需的演化得以实现。 讨论了该方法在绝热量子态转移、超导量子比特和广义朗道-齐纳问题中的应用。 显示英文摘要

摘要： We present a systematic, perturbative method for correcting quantum gates to suppress errors that take the target system out of a chosen subspace. It addresses the generic problem of non-adiabatic errors in adiabatic evolution and state preparation, as well as general leakage errors due to spurious couplings to undesirable states. The method is based on the Magnus expansion: by correcting control pulses, we modify the Magnus expansion of an initially-given, imperfect unitary in such a way that the desired evolution is obtained. Applications to adiabatic quantum state transfer, superconducting qubits and generalized Landau-Zener problems are discussed.