Geometric tensors via spectral functionals

Ludwik Dabrowski (SISSA, Trieste)

Jul 24. 2024, 11:30 — 12:15

For a given Dirac operator we use the noncommutative residue to define certain functionals of differential forms which yield such tensors as: metric, Einstein, and torsion. We generalise these concepts in non-commutative geometry and show e.g. that for the conformally rescaled noncommutative 2-torus the Einstein and the torsion functionals vanish. Also the Hodge-de Rham, Einstein-Yang-Mills, and quantum SU(2) group spectral triples are torsion free, while the almost commutative 2-sheeted manifold has torsion. Based on Adv.Math. 427, 1091286 (2023); Commun.Math.Phys. 130 (2024) and JNCG DOI 10.4171/JNCG/573 (2024) with A. Sitarz and P. Zalecki.

Further Information
Venue:
ESI Boltzmann Lecture Hall
Files:
Slides
Slides
Associated Event:
Exactly Solvable Models (Workshop)
Organizer(s):
Maja Buric (U of Belgrade)
Edwin Langmann (KTH Stockholm)
Harold Steinacker (U of Vienna)
Raimar Wulkenhaar (U Münster)