Injectivity of The Heisenberg X-ray Transform

Steven Flynn

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1 Citation (SciVal)


We initiate the study of X-ray tomography on sub-Riemannian manifolds, for which the Heisenberg group exhibits the simplest nontrivial example. With the language of the group Fourier transform, we prove an operator-valued incarnation of the Fourier Slice Theorem, and apply this new tool to show that a sufficiently regular function on the Heisenberg group is determined by its line integrals over sub-Riemannian geodesics. We also consider the family of taming metrics approximating the sub-Riemannian metric, and show that the associated X-ray transform is injective for all . This result gives a concrete example of an injective X-ray transform in a geometry with an abundance of conjugate points.
Original languageEnglish
Article number108886
JournalJournal of Functional Analysis
Issue number5
Early online date11 Dec 2020
Publication statusPublished - 1 Mar 2021


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