• What is quantum electrodynamics (QED) ?

It is the most accurate theory to describe light-matter interactions

  • What is the aim of this website ?

This site is an introduction to QED for molecular systems

  • Why is QED important ?

It is used to describe optical phenomena and has enabled many new discoveries

  • How does QED differ to the classical methods ?

Both light and matter are quantised, i.e. a full quantum framework is employed

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