论文标题
用拉曼型自旋轨道耦合探测两维费米超氟中的两个希格斯振荡
Probing two Higgs oscillations in a one-dimensional Fermi superfluid with Raman-type spin-orbit coupling
论文作者
论文摘要
从理论上讲，我们在一维拉曼型旋转轨道耦合的费米超级流体中与时间依赖性的bogoliubov-de Gennes方程中研究了希格斯的振荡。通过在Bardeen-Cooper-Schrieffer状态和拓扑超流体状态中线性横冲或突然改变有效的Zeeman场，我们发现该顺序参数的幅度表现出随着时间的流逝，随着时间的流逝，两种不同的频率（即两个HIGGS振动）在公约中具有两个不同的频率（即两个不同的频率）。观察到的振荡周期与使用先前的预测[Volkov and Kogan，J。Exp。理论。物理。 38，1018（1974）]，其中振荡周期现在由该系统中两个准粒子光谱的最小值确定。我们使用具有定期坡道策略（理论上计算的驱动频率）进一步验证了两个希格斯振荡的存在。我们的预测对于在旋转轨道耦合系统中这些HIGGS振荡的进一步理论和实验研究将很有用。
We theoretically investigate the Higgs oscillation in a one-dimensional Raman-type spin-orbit-coupled Fermi superfluid with the time-dependent Bogoliubov-de Gennes equations. By linearly ramping or abruptly changing the effective Zeeman field in both the Bardeen-Cooper-Schrieffer state and the topological superfluid state, we find the amplitude of the order parameter exhibits an oscillating behaviour over time with two different frequencies (i.e., two Higgs oscillations) in contrast to the single one in a conventional Fermi superfluid. The observed period of oscillations has a great agreement with the one calculated using the previous prediction [Volkov and Kogan, J. Exp. Theor. Phys. 38, 1018 (1974)], where the oscillating periods are now determined by the minimums of two quasi-particle spectrum in this system. We further verify the existence of two Higgs oscillations using a periodic ramp strategy with theoretically calculated driving frequency. Our predictions would be useful for further theoretical and experimental studies of these Higgs oscillations in spin-orbit-coupled systems.
