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arXiv 1809.07579quant-ph
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基于状态无关准绝热动力学的相干布居转移

Coherent population transfer via state-independent quasi-adiabatic dynamics

Jian Xu, Yan-Xiong Du, Wei Huang

摘要:

高保真度和鲁棒的相干布居转移是相干量子控制中的一个重大挑战。与已知的绝热条件不同,我们从Landau-Zener隧穿的思想出发,提出了一个严格的绝热条件。在此基础上,我们提出了一种相干布居转移方法,该方法只需要一个控制参数,并且依赖于系统的特征值。与快速准绝热动力学、绝热通道的捷径等方法相比,数值计算表明,该方法在不影响速度的情况下,可以提供更高的保真度和更强的鲁棒性.总之,我们的方法开辟了一条新的途径,以进一步提高保真度和相干人口转移的鲁棒性。此外,它还可以推广到本征态的精确表达式难以获得或系统的参数难以同时驱动的复杂量子系统。

英文摘要:

High-fidelity and robust coherent population transfer is a major challenge in coherent quantum control. Different from the well known adiabatic condition, we present a rigorous adiabatic condition that is inspired by the idea of the Landau-Zener tunneling. Based on this, we propose a coherent population transfer approach, which just needs only one control parameter and depends on the eigenvalues of the systems. Compared to other approaches, such as fast quasiadiabatic dynamics, shortcut to adiabatic passage, we numerically demonstrate that our approach can provide a more high-fidelity and more robustness coherent population transfer without affecting the speed. In short, our approach opens a new way to further increase the fidelity and the robustness of coherent population transfer. Moreover, it may be generalized to complex quantum systems where the exact expressions of eigenstates are difficult to obtain or the paremeters of systems are difficult to simultaneously drive.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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