93-300 Jakob Yngvason

A Note on Essential Duality (42K, TeX) Nov 17, 93

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Abstract. By considering some simple models it is shown that the essential duality condition for local nets of von Neumann algebras associated with Wightman fields need not be fulfilled if Lorentz covariance is dropped. These models illustrate a point made by Borchers in the proof of his two dimensional CPT theorem for local nets: The Lorentz covariant net constructed from the wedge algebras of a given two dimensional net may not be unique. It is also shown that in higher dimensions the Lorentz boosts constructed by means of the modular groups of wedge algebras may act nonlocally in the directions parallel to the edge of the wedge.

Files: 93-300.tex