Technology and Performance Benchmarks of IQM's 20-Qubit Quantum Computer

TL;DR

This paper details the technological design and performance benchmarks of IQM's 20-qubit superconducting quantum computer, highlighting its architecture, fidelity, and entanglement capabilities, with plans to scale to 150 qubits.

Contribution

It introduces the full-stack design of IQM's quantum computer and provides benchmark results demonstrating high fidelity and entanglement in a 20-qubit system.

Findings

Median 2-qubit gate fidelity of 99.5%

Genuinely entangled all 20 qubits in a GHZ state

Scalability plan to 150 qubits

Abstract

Quantum computing has tremendous potential to overcome some of the fundamental limitations present in classical information processing. Yet, today's technological limitations in the quality and scaling prevent exploiting its full potential. Quantum computing based on superconducting quantum processing units (QPUs) is among the most promising approaches towards practical quantum advantage. In this article the basic technological approach of IQM Quantum Computers is described covering both the QPU and the rest of the full-stack quantum computer. In particular, the focus is on a 20-qubit quantum computer featuring the Garnet QPU and its architecture, which we will scale up to 150 qubits. We also present QPU and system-level benchmarks, including a median 2-qubit gate fidelity of 99.5% and genuinely entangling all 20 qubits in a Greenberger-Horne-Zeilinger (GHZ) state.