infinite tensor products 1product unitaries 1quantum decoherence 1ultrametric spaces 1von neumann algebras 1
From the 1 of 3 linked papers with an AI index.
3 papers
quant-ph2026
A complete ultrametric on von Neumann's incomplete tensor products
Andrew Lesniewski
The paper revisits von Neumann's theory of infinite tensor products of Hilbert spaces and defines a natural pseudo‑ultrametric on equivalence classes of C₀‑sequences, proving it is…
cs.IT2026
Ricci flow for the Bures--Helstrom qubit metric
Andrew Lesniewski
The Bures--Helstrom metric is the minimal monotone Riemannian metric on the state space of a qubit. With the quantum Fisher normalization used here, it identifies the Bloch ball wi…
q-fin.MF2026
Mortgage Burnout and Selection Effects in Heterogeneous Cox Hazard Models
Andrew Lesniewski
We study the aggregate hazard rate of a heterogeneous population whose individual event intensities are modeled as Cox (doubly stochastic) processes. In the deterministic hazard se…