Results 41 to 50 of about 831,773 (152)
Squeezed‐State Semi‐Device‐Independent Quantum Randomness Generation
Advanced Quantum Technologies, Volume 9, Issue 9, September 2026.Semi‐device‐independent quantum randomness is certified for squeezed‐coherent binary states using only their trusted overlap and the observed homodyne error. Including the deterministic extremes of the full binary‐qubit POVM gives the correct closed‐form Shannon rate.
Hamid Tebyanian
wiley +1 more source
A new class of log-convexity inequalities and applications
Journal of Inequalities and ApplicationsIn this paper, we develop a new class of refined inequalities for log convex functions, motivated by and extending the classical Young-type inequality.
Yonghui Ren +3 more
doaj +1 more source
Systems Thinking for T‐Shaped Sustainability Education: A Viable Systems Approach (vSa)
Systems Research and Behavioral Science, Volume 43, Issue 5, Page 2107-2123, September/October 2026.ABSTRACT Sustainability represents a complex and evolving paradigm calling for competences necessary for a deep understanding of the interdependencies among human, environmental, economic, and cultural dimensions. Along with a review of the literature and an analysis of official guidelines from leading international institutions, this study assesses ...
Marialuisa Saviano +4 more
wiley +1 more source
On Exponentially Long Prethermalization Timescales in Isolated Quantum Systems
Studies in Applied Mathematics, Volume 157, Issue 3, September 2026.ABSTRACT We study prethermalization in time‐independent quantum many‐body systems on a d$d$‐dimensional lattice with an extensive local Hamiltonian H=N+εP$H=N+\varepsilon P$, in the regime where ε≪1$\varepsilon \ll 1$. We prove that the prethermal timescale is exponential in ε0/ε$\varepsilon _0/\varepsilon$, where ε0$\varepsilon _0$ is an explicit ...
Matteo Gallone
wiley +1 more source
Geometry of essential matrix ranges and the Smith–Ward problem for operator systems
Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.Abstract A d$d$‐tuple of bounded linear selfadjoint operators acting on an infinite‐dimensional separable Hilbert space is said to have the Smith–Ward property if the identity map of the image of the operator system in the Calkin algebra has a completely positive lift.
Douglas Farenick +2 more
wiley +1 more source
Unitarily invariant norms related to factors
, 2007 42 pages, the introduction is rewritten, minor ...
Fang, Junsheng, Hadwin, Don
openaire +2 more sources
A proof of Esterle's conjecture on negative powers of Hilbert‐space contractions
Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.Abstract We establish the following result, confirming a conjecture of Jean Esterle. For each closed subset E$E$ of the unit circle of Lebesgue measure zero, there exists a positive sequence un→∞$u_n\rightarrow \infty$ with the following property: If T$T$ is a contraction on a Hilbert space such that σ(T)⊂E$\sigma (T)\subset E$ and ∥T−n∥=O(un)$\Vert T^{
Thomas Ransford
wiley +1 more source
UNITARILY INVARIANT NORMS ON FINITE VON NEUMANN ALGEBRAS [PDF]
, 2018 John von Neumann’s 1937 characterization of unitarily invariant norms on the n × n matrices in terms of symmetric gauge norms on Cn had a huge impact on linear algebra. In 2008 his results were extended to Ifactor von Neumann algebras by J.
Fan, Haihui
core +1 more source
Detecting When One Probe Vector is Enough for Preconditioned Log‐Determinant Approximation
Numerical Linear Algebra with Applications, Volume 33, Issue 4, August 2026.ABSTRACT We present randomized algorithms for estimating the log‐determinant of regularized symmetric positive semi‐definite matrices. The algorithms access the matrix only through matrix vector products, and are based on the introduction of a preconditioner and stochastic trace estimator.
Alice Cortinovis, Daniele Toni
wiley +1 more source
Null projections and noncommutative function theory in operator algebras
Journal of the London Mathematical Society, Volume 114, Issue 1, July 2026.Abstract We study projections in the bidual of a C∗$\mathrm{C}^*$‐algebra B$B$ that are null with respect to a subalgebra A$A$, that is, projections p∈B∗∗$p\in B^{**}$ satisfying |φ|(p)=0$|\varphi |(p)=0$ for every φ∈B∗$\varphi \in B^*$ annihilating A$A$. In the separable case, A$A$‐null projections are precisely the peak projections in the bidual of A$
David P. Blecher, Raphaël Clouâtre
wiley +1 more source