Suppression of decoherence in fast-atom diffraction at surfaces.
Suppression of decoherence in fast-atom diffraction at surfaces.
复制标题
表面快原子衍射中退相干的抑制。
DOI：
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发表时间：
2008
影响因子：
8.6
通讯作者：
J. Burgdörfer
中科院分区：
文献类型：
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作者：
F. Aigner;N. Simonović;B. Solleder;L. Wirtz;J. Burgdörfer
具有keV动能的快中性原子在掠掠角下在卤化物表面的散射显示出有趣的衍射图样。尽管在固体密度和高温环境下与脉冲相互作用，量子相干性的惊人强持久性提出了诸如抑制退相干和量子-经典交叉等基本问题。我们提出了在LiF（100）表面上快速氦束在110方向上的量子衍射的从头算模拟，并与最近的实验衍射数据进行了比较。从衍射图像的定量重建，可以确定垂直liff表面的重建，或屈曲。
Scattering of fast neutral atoms with keV kinetic energies at alkali-halide surfaces under grazing angles displays intriguing diffraction patterns. The surprisingly strong persistence of quantum coherence despite the impulsive interaction with an environment at solid state density and elevated temperatures raises fundamental questions such as to the suppression of decoherence and of the quantum-to-classical crossover. We present an ab initio simulation of the quantum diffraction of fast helium beams at a LiF (100) surface in the 110 direction and compare with recent experimental diffraction data. From the quantitative reconstruction of diffraction images the vertical LiF-surface reconstruction, or buckling, can be determined.