School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia.
Phys Rev Lett. 2011 May 27;106(21):210802. doi: 10.1103/PhysRevLett.106.210802.
We consider transitions of electron holes (vacancies in otherwise filled shells of atomic systems) in multiply charged ions that, due to level crossing of the holes, have frequencies within the range of optical atomic clocks. Strong E1 transitions provide options for laser cooling and trapping, while narrow transitions can be used for high-precision spectroscopy and tests of fundamental physics. We show that hole transitions can have extremely high sensitivity to α variation and propose candidate transitions that have much larger α sensitivities than any previously seen in atomic systems.
我们考虑多电荷离子中电子空穴（原子系统满壳层中的空位）的跃迁，由于空穴的能级交叉，这些跃迁的频率在光学原子钟的范围内。强 E1 跃迁为激光冷却和俘获提供了选择，而窄跃迁可用于高精度光谱学和基本物理测试。我们表明，空穴跃迁对 α 变化具有极高的灵敏度，并提出了候选跃迁，其 α 灵敏度比以前在原子系统中看到的任何跃迁都要大得多。
