Helios: A 98-qubit trapped-ion quantum computer

2025/11/07 by Anthony Ransford, Ransford, Anthony, M. S. Allman +369 · 6 voices · 11 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena

paper · pdf · doi:10.48550/arxiv.2511.05465

Abstract

We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features ¹³⁷Ba⁺ 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 2.5(1)×10^-5 for single-qubit gates, 7.9(2)×10^-4 for two-qubit gates, and 4.8(6)×10^-4 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.

Citations

• Quantum error correction below the surface code threshold
• Strong Quantum Computational Advantage Using a Superconducting Quantum Processor

Cited by

• Medusa: Detecting and Removing Failures for Scalable Quantum Computing
• Hybrid physical/logical zero-noise extrapolation with limited logical executions
• Performance Model for Hybrid Quantum-Classical Workflows
• A framework of partial error correction for intermediate-scale quantum computers
• Computing with many encoded logical qubits beyond break-even
• Fault-tolerant execution of error-corrected quantum algorithms
• The EU Quantum Flagship's Key Performance Indicators for Quantum Computing
• Shuttling Compiler for Trapped-Ion Quantum Computers Based on Large Language Models
• Rapid multi-mode trapped-ion laser cooling in a phase-stable standing wave
• Optimized Many-Hypercube Codes toward Lower Logical Error Rates and Earlier Realization
• A Heuristic for Matrix Product State Simulation of Out-of-Equilibrium Dynamics of Two-Dimensional Transverse-Field Ising Models
• Note on Logical Gates by Gauge Field Formalism of Quantum Error Correction
• Realization of a Quantum Streaming Algorithm on Long-lived Trapped-ion Qubits

Discussions

• Our new Helios quantum computer. Read all about it. arxiv.org/abs/2511.05465 #quantum #quantumcomputing #quantinuum #helios [bsky, 25 points, 1 comments]
• Our new quantum computer Helios is out. Take a look at this paper for technical details of its design, operations, and benchmarks. arxiv.org/abs/2511.05465 [bsky, 9 points, 1 comments]
• Helios: A 98-qubit trapped-ion quantum computer [hn, 2 points, 0 comments]
• Helios: A 98-qubit trapped-ion quantum computer [hn, 2 points, 0 comments]
• arxiv.org/abs/2511.05465 I have my name on this paper because I (my team) made the website (the platform for job management and submission) [bsky, 1 points, 1 comments]
• Helios: A 98-qubit trapped-ion quantum computer [hn, 1 points, 0 comments]

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