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摘要
本文研究周期梯度磁场作用下，两组分玻色-爱因斯坦凝聚体的动力学演化。研究方法包括在线性情况下的解析分析和非线性情况下的数值模拟。在线性情况下，通过应用旋波近似，随时间演化的系统波函数能够被解析求解。结果表明凝聚体中两个组分的原子在磁场作用下进行拉比振荡，通过调整磁场的梯度和周期能够控制拉比振荡的振幅和振荡周期。在非线性情况下，通过数值求解Gross-Pitaevskii方程发现当非线性较弱时，结果与线性的情况类似。随着非线性强度的增加，系统的共振点发生偏移，基态原子转移到激发态上的比例逐渐下降。本文研究的重点是在共振情况下，通过拉比振荡将基态原子转移到激发态上，从而为进一步研究激发态的动力学特性铺平道路。
关键词
周期调制
/
旋波近似
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能级跃迁
/
共振点偏移
Key words
periodic modulation
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rotating wave approximation
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energy level transition
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resonant points shift
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高乐乐,罗焕波,李禄.
玻色-爱因斯坦凝聚体中周期梯度磁场诱导的拉比振荡[J].
山西大学学报(自然科学版), 2025, 48(03): 558-564 DOI:10.13451/j.sxu.ns.2024035
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