V2EX lamb shift

Lamb Shift

释义 Definition

兰姆位移:指氢原子等类氢原子中,原本在狄拉克理论下应能量简并的能级(典型如 2S_{1/2}2P_{1/2})由于量子电动力学效应(如真空涨落、自能修正等)而产生的微小能级差

发音 Pronunciation (IPA)

/lm ft/

例句 Examples

The Lamb shift is a tiny difference between two hydrogen energy levels.
兰姆位移是氢原子两个能级之间的微小差异。

By measuring the Lamb shift precisely, physicists tested key predictions of quantum electrodynamics.
通过精确测量兰姆位移,物理学家检验了量子电动力学的一些关键预测。

词源 Etymology

“Lamb shift”以美国物理学家 Willis E. Lamb(威利斯兰姆)命名;他与合作者在 1947 年通过微波谱学实验观测到该能级差。“shift”意为“位移/偏移”,指能级相对理论预期的偏移。

相关词 Related Words

文学与经典著作 Literary Works

  • Willis E. Lamb & Robert C. Retherford, “Fine Structure of the Hydrogen Atom by a Microwave Method” (1947)
  • Hans A. Bethe, “The Electromagnetic Shift of Energy Levels” (1947)
  • Richard P. Feynman, Robert B. Leighton, Matthew Sands, The Feynman Lectures on Physics(讲到兰姆位移与QED效应)
  • Richard P. Feynman, QED: The Strange Theory of Light and Matter(讨论QED现象背景,常提及兰姆位移)
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