5 papers
Below-threshold execution of fault-tolerant ripple-carry addition on a trapped-ion quantum computer
Jacob S. Nelson, Andrew J. Landahl, Andrew D. Baczewski
We deploy a universal fault-tolerant quantum computing (FTQC) architecture based on error-detecting and codes on Quantinuum's Helios-1 trapped-ion q…
Benchmarking the computational power of quantum computers
Timothy Proctor, Oliver Hart, Oliver Widzowski Maupin +27
Quantum computing hardware is advancing rapidly toward utility-scale machines that will enable scientific breakthroughs. Many teams are pursuing distinct and difficult-to-compare r…
Estimating Green's functions with a robust quantum Arnoldi method
Jacob S. Nelson, Andrew B. Baczewski
Many applications of Green's functions (GFs) require their evaluation over intervals or at multiple points, motivating quantum algorithms that return an efficiently computable func…
A small and interesting architecture for early fault-tolerant quantum computers
Jacob S. Nelson, Andrew J. Landahl, Andrew D. Baczewski
We present an architecture for early fault-tolerant quantum computers based on the smallest interesting colour code (Earl Campbell, 2016). It realizes a universal logical gate set…
An assessment of quantum phase estimation protocols for early fault-tolerant quantum computers
Jacob S. Nelson, Andrew D. Baczewski
We compare several quantum phase estimation (QPE) protocols intended for early fault-tolerant quantum computers (EFTQCs) in the context of models of their implementations on a surf…