Helios: A 98-qubit trapped-ion quantum computer
Abstract
We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features Ba hyperfine qubits, all-to-all connectivity enabled by a rotatable ion storage ring connecting two quantum operation regions by a junction, speed improvements from parallelized operations, and a new software stack with real-time compilation of dynamic programs. Averaged over all operational zones in the system, we achieve average infidelities of for single-qubit gates, for two-qubit gates, and for state preparation and measurement, none of which are fundamentally limited and likely able to be improved. These component infidelities are predictive of system-level performance in both random Clifford circuits and random circuit sampling, the latter demonstrating that Helios operates well beyond the reach of classical simulation and establishes a new frontier of fidelity and complexity for quantum computers.
Keywords
Cite
@article{arxiv.2511.05465,
title = {Helios: A 98-qubit trapped-ion quantum computer},
author = {Anthony Ransford and M. S. Allman and Jake Arkinstall and J. P. Campora and Samuel F. Cooper and Robert D. Delaney and Joan M. Dreiling and Brian Estey and Caroline Figgatt and Alex Hall and Ali A. Husain and Akhil Isanaka and Colin J. Kennedy and Nikhil Kotibhaskar and Ivaylo S. Madjarov and Karl Mayer and Alistair R. Milne and Annie J. Park and Adam P. Reed and Riley Ancona and Molly P. Andersen and Pablo Andres-Martinez and Will Angenent and Liz Argueta and Benjamin Arkin and Leonardo Ascarrunz and William Baker and Corey Barnes and John Bartolotta and Jordan Berg and Ryan Besand and Bryce Bjork and Matt Blain and Paul Blanchard and Robin Blume-Kohout and Matt Bohn and Agustin Borgna and Daniel Y. Botamanenko and Robert Boutelle and Natalie Brown and Grant T. Buckingham and Nathaniel Q. Burdick and William Cody Burton and Varis Carey and Christopher J. Carron and Joe Chambers and John Children and Victor E. Colussi and Steven Crepinsek and Andrew Cureton and Joe Davies and Daniel Davis and Matthew DeCross and David Deen and Conor Delaney and Davide DelVento and B. J. DeSalvo and Jason Dominy and Ross Duncan and Vanya Eccles and Alec Edgington and Neal Erickson and Stephen Erickson and Christopher T. Ertsgaard and Bruce Evans and Tyler Evans and Maya I. Fabrikant and Andrew Fischer and Cameron Foltz and Michael Foss-Feig and David Francois and Brad Freyberg and Charles Gao and Robert Garay and Jane Garvin and David M. Gaudiosi and Christopher N. Gilbreth and Josh Giles and Erin Glynn and Jeff Graves and Azure Hansen and David Hayes and Lukas Heidemann and Bob Higashi and Tyler Hilbun and Jordan Hines and Ariana Hlavaty and Kyle Hoffman and Ian M. Hoffman and Craig Holliman and Isobel Hooper and Bob Horning and James Hostetter and Daniel Hothem and Jack Houlton and Jared Hout and Ross Hutson and Ryan T. Jacobs and Trent Jacobs and Melf Johannsen and Jacob Johansen and Loren Jones and Sydney Julian and Ryan Jung and Aidan Keay and Todd Klein and Mark Koch and Ryo Kondo and Chang Kong and Asa Kosto and Alan Lawrence and David Liefer and Michelle Lollie and Dominic Lucchetti and Nathan K. Lysne and Christian Lytle and Callum MacPherson and Andrew Malm and Spencer Mather and Brian Mathewson and Daniel Maxwell and Lauren McCaffrey and Hannah McDougall and Robin Mendoza and Michael Mills and Richard Morrison and Louis Narmour and Nhung Nguyen and Lora Nugent and Scott Olson and Daniel Ouellette and Jeremy Parks and Zach Peters and Jessie Petricka and Juan M. Pino and Frank Polito and Matthias Preidl and Gabriel Price and Timothy Proctor and McKinley Pugh and Noah Ratcliff and Daisy Raymondson and Peter Rhodes and Conrad Roman and Craig Roy and Ciaran Ryan-Anderson and Fernando Betanzo Sanchez and George Sangiolo and Tatiana Sawadski and Andrew Schaffer and Peter Schow and Jon Sedlacek and Henry Semenenko and Peter Shevchuk and Susan Shore and Peter Siegfried and Kartik Singhal and Seyon Sivarajah and Thomas Skripka and Lucas Sletten and Ben Spaun and R. Tucker Sprenkle and Paul Stoufer and Mariel Tader and Stephen F. Taylor and Travis H. Thompson and Raanan Tobey and Anh Tran and Tam Tran and Grahame Vittorini and Curtis Volin and Jim Walker and Sam White and Douglas Wilson and Quinn Wolf and Chester Wringe and Kevin Young and Jian Zheng and Kristen Zuraski and Charles H. Baldwin and Alex Chernoguzov and John P. Gaebler and Steven J. Sanders and Brian Neyenhuis and Russell Stutz and Justin G. Bohnet},
journal= {arXiv preprint arXiv:2511.05465},
year = {2025}
}