Trace-class operators on Hilbert modules and Haagerup tensor products
Operator Algebras
2025-04-09 v2
Abstract
We show that the space of trace-class operators on a Hilbert module over a commutative C*-algebra, as defined and studied in earlier work of Stern and van Suijlekom (Journal of Functional Analysis, 2021), is completely isometrically isomorphic to a Haagerup tensor product of the module with its operator-theoretic adjoint. This generalises a well-known property of Hilbert spaces. In the course of proving this, we also obtain a new proof of a result of Stern-van Suijlekom concerning the equivalence between two definitions of trace-class operators on Hilbert modules.
Cite
@article{arxiv.2403.00449,
title = {Trace-class operators on Hilbert modules and Haagerup tensor products},
author = {Tyrone Crisp and Michael Rosbotham},
journal= {arXiv preprint arXiv:2403.00449},
year = {2025}
}
Comments
16 pages. v2: added Section 5; corrected some typos