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Quantum Engineering Year 2: Advanced Quantum Science Month 36Day 988

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Year 2·Month 36·Week 2

Day 988: Logical Qubit Milestones (Google, IBM, Quantinuum)

Day 988 of 2,016~17 min read

Learning Objectives

•**Summarize** Google's Willow processor achievements and their significance
•**Analyze** IBM's trajectory from utility to fault-tolerant computing
•**Evaluate** Quantinuum's trapped-ion logical qubit demonstrations
•**Compare** different platforms' approaches to logical qubit milestones
•**Critically assess** claims about error suppression below threshold
•**Identify** key metrics for evaluating logical qubit quality

Today's Schedule (7 hours)

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On this page

1 The Logical Qubit Era Begins Defining Logical Qubit Success 2 Google Quantum AI Willow Processor The December 2024 Announcement Key Achievements 3 IBM Quantum The Utility Era Condor and Heron Architectures IBMs Roadmap to Fault Tolerance Circuit Knitting and Error Mitigation 4 Quantinuum Trapped-Ion Precision H2 Processor Achievements Fault-Tolerant Demonstrations 5 Comparative Analysis Framework Logical Qubit Quality Metrics Platform Comparison 2025 Data 6 Trends and Projections The Below-Threshold Transition Projected Trajectories

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