485 citations · 2.2k across the 55 of their papers we have counts for
8 papers · 1 filter
A converse to Lieb-Robinson bounds in one dimension using index theory
Daniel Ranard, Michael Walter, Freek Witteveen
Unitary dynamics with a strict causal cone (or "light cone") have been studied extensively, under the name of quantum cellular automata (QCAs). In particular, QCAs in one dimension…
Quantum algorithms for matrix scaling and matrix balancing
Joran van Apeldoorn, Sander Gribling, Yinan Li +3
Matrix scaling and matrix balancing are two basic linear-algebraic problems with a wide variety of applications, such as approximating the permanent, and pre-conditioning linear sy…
Maximum likelihood estimation for tensor normal models via castling transforms
Harm Derksen, Visu Makam, Michael Walter
In this paper, we study sample size thresholds for maximum likelihood estimation for tensor normal models. Given the model parameters and the number of samples, we determine whethe…
Matchgate benchmarking: Scalable benchmarking of a continuous family of many-qubit gates
Jonas Helsen, Sepehr Nezami, Matthew Reagor +1
We propose a method to reliably and efficiently extract the fidelity of many-qubit quantum circuits composed of continuously parametrized two-qubit gates called matchgates. This me…
Interior-point methods for unconstrained geometric programming and scaling problems
Peter Bürgisser, Yinan Li, Harold Nieuwboer +1
We provide a condition-based analysis of two interior-point methods for unconstrained geometric programs, a class of convex programs that arise naturally in applications including…
Minimal length in an orbit closure as a semiclassical limit
Cole Franks, Michael Walter
Consider the action of a connected complex reductive group on a finite-dimensional vector space. A fundamental result in invariant theory states that the orbit closure of a vector…