通过混合状态逆工程实现高保真核相干群体转移

IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy
Ying Wang, Fu-Quan Dou
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引用次数: 0

摘要

核相干群体转移(NCPT)在原子核的探索和应用中发挥着重要作用。迄今为止,如何实现高保真的 NCPT 仍然充满挑战。在这里,我们研究了核状态的完整种群转移。我们首先考虑了一个循环三电平系统,该系统基于混合状态逆工程方案,通过在一个具有自发辐射的开放三电平核系统中添加额外的激光场来实现。我们发现附加场的振幅与泵浦场和斯托克斯场振幅的比值有关。只要选择适当的附加场,即使泵浦场和斯托克斯场的强度极低,也能实现完全转移。在激光峰值强度和脉冲延迟方面,传输效率表现出卓越的稳健性。我们通过 Th229、Ra223、Cd113 和 Tc97(具有长寿命激发态)以及 Re187、Yb172、Er168 和 Gd154(具有短寿命激发态)等实例来证明其有效性。在没有额外耦合的情况下,我们进一步将三电平系统简化为有效的两电平问题。我们通过使用反绝热驱动来修改泵浦脉冲和斯托克斯脉冲,从而实现高保真种群转移。这些方案为控制核状态开辟了新的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

High-fidelity nuclear coherent population transfer via mixed-state inverse engineering

High-fidelity nuclear coherent population transfer via mixed-state inverse engineering
Nuclear coherent population transfer (NCPT) plays an important role in the exploration and application of atomic nuclei. How to achieve high-fidelity NCPT remains so far challenging. Here, we investigate the complete population transfer of nuclear states. We first consider a cyclic three-level system, based on the mixed-state inverse engineering scheme by adding additional laser fields in an open three-level nuclear system with spontaneous emission. We find the amplitude of the additional field is related to the ratio of the pump and Stokes field amplitudes. As long as an appropriate additional field is selected, complete transfer can be achieved even when the intensities of the pump and Stokes fields are exceedingly low. The transfer efficiency exhibits excellent robustness with respect to laser peak intensity and pulse delay. We demonstrate the effectiveness through examples such as Th229, Ra223, Cd113, and Tc97, which have a long lifetime excited state, as well as Re187, Yb172, Er168, and Gd154 with a short lifetime excited state. Focusing on the case without additional coupling, we further reduce the three-level system to an effective two-level problem. We modify the pump and Stokes pulses by using counterdiabatic driving to implement high-fidelity population transfer. The schemes open up new possibilities for controlling nuclear states.
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来源期刊
Physical Review C
Physical Review C 物理-物理:核物理
CiteScore
5.70
自引率
35.50%
发文量
0
审稿时长
1-2 weeks
期刊介绍: Physical Review C (PRC) is a leading journal in theoretical and experimental nuclear physics, publishing more than two-thirds of the research literature in the field. PRC covers experimental and theoretical results in all aspects of nuclear physics, including: Nucleon-nucleon interaction, few-body systems Nuclear structure Nuclear reactions Relativistic nuclear collisions Hadronic physics and QCD Electroweak interaction, symmetries Nuclear astrophysics
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