氦原子上的多电子体系与色心光谱
Many-electron system on helium and the color center spectroscopy
摘要：
氦表面上的电子显示尖锐的共振吸收线与横向于表面的量子化运动的子带之间的过渡。平行于表面的磁场强烈影响吸收光谱。我们证明了这种效应是由于在强关联电子液体或维格纳晶体的面内量子动力学中混入了离面运动。这类似于色心中的电子向声子的混合跃迁。该光谱允许直接表征多电子动力学，并且还能够测试具有可控耦合的系统中的色心理论。
英文摘要：
Electrons on the helium surface display sharp resonant absorption lines related to the transitions between the subbands of quantized motion transverse to the surface. A magnetic field parallel to the surface strongly affects the absorption spectrum. We show that the effect comes from admixing the out-of-plane motion to the in-plane quantum dynamics of the strongly correlated electron liquid or a Wigner crystal. This is similar to the admixing electron transitions in color centers to phonons. The spectrum permits a direct characterization of the many-electron dynamics and also enables testing the theory of color centers in a system with a controllable coupling.
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