3 papers
quant-ph2026
An Error-aware and Adaptive Method for the Estimation of Quantum Observables on Qudit-Based Quantum Computers
Rick P. A. Simon, Michael Meth, Francesco Martini +4
The accurate estimation of observables is a crucial task in quantum computing. Recent advances have highlighted the need for (a) specialized protocols for qudit-based devices, that…
quant-ph2025
Enhanced measurements on quantum computers via the simultaneous probing of non-commuting Pauli operators
Rick P. A. Simon, Zheng Shi, Charlie Nation +2
Measuring the state of quantum computers is a highly non-trivial task, with implications for virtually all quantum algorithms. We propose a novel scheme where identical copies of a…
quant-ph2024
Concentration of ergotropy in many-body systems
Karen V. Hovhannisyan, Rick P. A. Simon, Janet Anders
Ergotropy -- the maximal amount of unitarily extractable work -- measures the ``charge level'' of quantum batteries. We prove that in large many-body batteries ergotropy exhibits a…