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Helicity and angular momentum: A symmetry-based framework for the study of light-matter interactions

机译：螺旋度和角动量：基于对称性的光物质相互作用研究框架

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摘要

We propose a theoretical and practical framework for the study of light-matter interactions and the angularnmomentum of light. Our proposal is based on helicity, total angular momentum, and the use of symmetries. Wencompare the framework to the current treatment,which is based on separately considering spin angular momentumnand orbital angular momentum and using the transfer between the two in physical explanations. In our proposal,nthe fundamental problem of spin and orbital angular momentum separability is avoided, predictions are madenbased on the symmetries of the systems, and the practical application of the concepts is straightforward. Finally, thenframework is used to show that the concept of spin to orbit transfer applied to focusing and scattering is maskingntwo completely different physical phenomena related to the breaking of different fundamental symmetries:ntransverse translational symmetry in focusing and electromagnetic duality symmetry in scattering.
机译：我们提出了一个理论和实践框架，用于研究光与物质的相互作用以及光的角动量。我们的建议基于螺旋度，总角动量和对称性的使用。 Wencomp将框架作为当前处理的基础，该框架基于分别考虑自旋角动量和轨道角动量并在物理解释中使用两者之间的转移。在我们的建议中，避免了自旋和轨道角动量可分离性的基本问题，基于系统的对称性进行了预测，并且这些概念的实际应用很简单。最后，然后用框架证明应用于聚焦和散射的自转轨道转移的概念掩盖了与打破基本对称有关的两个完全不同的物理现象：聚焦的横向平移对称和散射的电磁对偶对称。

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  • 来源
    《PHYSICAL REVIEW A》 |2012年第4期|1-14|共14页
  • 作者

    Ivan Fernandez-Corbaton; Xavier Zambrana-Puyalto; Gabriel Molina-Terriza;

  • 作者单位

    ARC Center of Excellence for Engineered Quantum Systems and Department of Physics AstronomyMacquarie University NSW 2109 Australia;

    ARC Center of Excellence for Engineered Quantum Systems and Department of Physics AstronomyMacquarie University NSW 2109 Australia;

    ARC Center of Excellence for Engineered Quantum Systems and Department of Physics AstronomyMacquarie University NSW 2109 Australia;

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