标题： 利用飞秒时钟装置检测环电流的机会 显示英文标题

标题： Opportunities for detecting ring currents using the attoclock set-up

摘要： 强磁场电离由具有内部轨道角动量的初始态在圆偏振激光场中的有趣倾向规则：与激光场反向旋转的电子比同向旋转的电子更容易被释放 [Barth和Smirnova PRA 84, 063415, 2011]。 在这里，我们表明应用少周期红外脉冲可以利用这种倾向规则来检测与这些量子态相关的环电流，通过观察被弹出电子的角度偏移。 这种偏移是阿托秒时钟方法的主要可观测量。 我们使用时间依赖的解析$R$-矩阵（A$R$M）理论来证明，来自两个反向旋转轨道（$p^{+}$和$p^{-}$）的电子的阿托秒时钟测量角度偏移明显不同。 我们的工作为使用阿托秒时钟装置检测原子和分子中激发的环电流开辟了新的机会。 显示英文摘要

摘要： Strong field ionization by circularly polarized laser fields from initial states with internal orbital momentum has interesting propensity rule: electrons counter-rotating with respect to the laser field can be liberated more easily than co-rotating electrons [Barth and Smirnova PRA 84, 063415, 2011}]. Here we show that application of few-cycle IR pulses allows one to use this propensity rule to detect ring currents associated with such quantum states, by observing angular shifts of the ejected electrons. Such shifts present the main observable of the attoclock method. We use time-dependent Analytical $R$-Matrix (A$R$M) theory to show that the attoclock measured angular shifts of an electron originating from two counter-rotating orbitals ($p^{+}$ and $p^{-}$) are noticeably different. Our work opens new opportunities for detecting ring currents excited in atoms and molecules, using the attoclock set-up.