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论文类型：期刊论文

发表时间：2013-09-28

发表刊物：JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS

收录刊物：SCIE、EI、Scopus

卷号：46

期号：18

ISSN号：0953-4075

摘要：We investigate the quantum reflection governed by the Casimir-Polder potential which scales as -1/r(3) at short separation and as -1/r(4) at long separation. Using the available analytical solutions for the -1/r(4) potential and quantum defect theory, we develop a three-parameter model for quantum reflection. The three parameters characterizing the potential are essentially constant near the threshold. The application scope of the model is examined. For a potential dominated by the -1/r(4) behaviour, which is the case in many realistic atom-surface systems, our model gives accurate results over the energy range in which the quantum reflection is significant. Moreover, this parameterized model allows one to fit the experimental data efficiently.