From the 1 of 3 linked papers with an AI index.
3 papers
math.FA2026
Completely Positive Matrix Products
Eric Evert, Michael T. Jury, Scott McCullough
The paper defines and characterizes JCP (completely positive) matrix products via the positivity of their associated Choi matrices and provides a Choi‑Kraus representation, then in…
math.FA2026
Matrix convex sets over the Euclidean ball and polar duals of real free spectrahedra
Eric Evert, Benjamin Passer
We show that the free spectrahedron determined by universal anticommuting self-adjoint unitaries is not equal to the minimal matrix convex set over the ball in dimension three or h…
quant-ph2025
Inclusion constants for free spectrahedra with applications to quantum incompatibility
Andreas Bluhm, Eric Evert, Igor Klep +2
Building on the matrix cube problem, inclusions of free spectrahedra have been used successfully to obtain relaxations of hard spectrahedral inclusion problems. The quality of such…