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Constructing KMS states from infinite-dimensional spectral triples

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We construct KMS-states from Li1-summable semifinite spectral triples and show that in several important examples the construction coincides with well-known direct constructions of KMS-states for naturally defined flows. Under further… Click to show full abstract

We construct KMS-states from Li1-summable semifinite spectral triples and show that in several important examples the construction coincides with well-known direct constructions of KMS-states for naturally defined flows. Under further summability assumptions the constructed KMS-state can be computed in terms of Dixmier traces. For closed manifolds, we recover the ordinary Lebesgue integral. For Cuntz–Pimsner algebras with their gauge flow, the construction produces KMS-states from traces on the coefficient algebra and recovers the Laca–Neshveyev correspondence. For a discrete group acting on its Stone–Cech boundary, we recover the Patterson–Sullivan measures on the Stone-Cech boundary for a flow defined from the Radon–Nikodym cocycle.

Keywords: kms states; constructing kms; states infinite; spectral triples; infinite dimensional; dimensional spectral

Journal Title: Journal of Geometry and Physics
Year Published: 2019

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