Quantum Art Validates Multi-Qubit Gates for Scalable Fault-Tolerant Quantum Computing

Quantum Art, a developer of full-stack fault-tolerant quantum computers based on trapped-ion qubits, announced research results verifying that its multi-qubit gate architecture supports scalable fault-tolerant quantum computing. The findings, validated through detailed microscopic noise modeling and comprehensive fault-tolerance simulations, demonstrate a practical fault-tolerance threshold at the 1% level using surface codes, suitable for scalable systems.

The research shows that dominant noise sources in multi-qubit gates can be described as effective single- and two-qubit error channels aligned with the gate's connectivity mapping, while unwanted long-range error propagation remains significantly weaker. This indicates that errors remain local and controlled, allowing logical error correction to improve as the system scales—a key benchmark for fault-tolerant operation.

“The most important result is that multi-qubit gates, favorable candidates for large scale quantum computation schemes, are also fully compatible and advantageous for fault tolerant codes,” said Dr. Amit Ben-Kish, CTO and co-founder of Quantum Art. “For years, the quantum computing industry has largely focused on fault-tolerant systems built from vast numbers of sequential one- and two-qubit operations, leaving open questions about whether large multi-qubit gates could support the same path. Our analysis shows that the errors remain local and controlled, and that a practical threshold exists.”

Quantum Art's architecture offers significant advantages in computational efficiency, circuit compression, system scalability, and overall hardware footprint. The findings show that while all-to-all connected multi-qubit gates enable circuit depth compression and reduced computational overhead by orders of magnitude, error propagation remains small and bound by the gate's connectivity mapping. This provides strong evidence that the architecture can scale while remaining compatible with fault-tolerant quantum computing requirements.

The milestone validates Quantum Art's roadmap toward large-scale fault-tolerant systems, including its planned Perspective platform—a 1,000-qubit multi-core quantum computer designed to support commercially relevant applications with 10s-100 logical qubits—as well as next-generation Landscape series supporting 1000s of logical qubits. The results are detailed in the paper "Trapped-Ion Multi qubit Gates are Compatible with Scalable Quantum Error Correction", authored by O. Grossman, Y. Kadish, S. Gazit, A. Ben-Kish, R. Ozeri and Y. Shapira.

By bridging device-level physics and quantum error-correction performance, Quantum Art’s research provides a clear path for scaling trapped-ion quantum computers with multi-qubit gates, moving the industry closer to practical fault-tolerant quantum computing.