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QED as the tensionless limit of the spinning string with contact interaction. (English) Zbl 1343.81217
Summary: QED with spinor matter is argued to correspond to the tensionless limit of spinning strings with contact interactions. The strings represent electric lines of force with charges at their ends. The interaction is constructed from a delta-function on the world-sheet which, although off-shell, decouples from the world-sheet metric. Integrating out the string degrees of freedom with fixed boundary generates the super-Wilson loop that couples spinor matter to electromagnetism in the world-line formalism. World-sheet and world-line, but not spacetime, supersymmetry underpin the model.

MSC:
81V10 Electromagnetic interaction; quantum electrodynamics
81T30 String and superstring theories; other extended objects (e.g., branes) in quantum field theory
81R25 Spinor and twistor methods applied to problems in quantum theory
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