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The Covariant Stone–von Neumann Theorem for Actions of Abelian Groups on $$ C^{*} $$-Algebras of Compact Operators

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In this paper, we formulate and prove a version of the Stone–von Neumann Theorem for every $$ C^{*} $$ -dynamical system of the form $$ \left( G,{\mathbb {K}} \left( {\mathcal… Click to show full abstract

In this paper, we formulate and prove a version of the Stone–von Neumann Theorem for every $$ C^{*} $$ -dynamical system of the form $$ \left( G,{\mathbb {K}} \left( {\mathcal {H}} \right) ,\alpha \right) $$ , where G is a locally compact Hausdorff abelian group and $$ {\mathcal {H}}$$ is a Hilbert space. The novelty of our work stems from our representation of the Weyl Commutation Relation on Hilbert $$ {\mathbb {K}} \left( {\mathcal {H}} \right) $$ -modules, instead of just Hilbert spaces, and our introduction of two additional commutation relations, which are necessary to obtain a uniqueness theorem. Along the way, we apply one of our basic results on Hilbert $$ C^{*} $$ -modules to significantly shorten the length of Iain Raeburn’s well-known proof of Takai–Takesaki Duality.

Keywords: stone von; neumann theorem; covariant stone; von neumann

Journal Title: Communications in Mathematical Physics
Year Published: 2020

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