Fault-Tolerant Quantum Computing
Crossing the threshold of logical qubits.
Explore this event on the interactive timeline →For decades, quantum computers were trapped in the "noisy" (NISQ) era, where adding more physical qubits simply increased the error rate. In early 2026, the industry officially crossed the "below-threshold" milestone, entering the Fault-Tolerant era.
Key Numbers
- Paradigm
- Logical Qubits (Error Corrected)
- Milestone
- Below-Threshold Scaling
Verified Facts
- By applying novel error-correcting codes (like qLDPC), companies proved that combining multiple physical qubits into a single "Logical Qubit" successfully suppressed errors exponentially.
- Google’s "Willow" chip and architectures from QuEra successfully demonstrated scalable logical qubits, shifting the industry metric from raw physical qubit counts to "QuOps" (Quantum Operations) and logical stability.
- This leap officially started the countdown to quantum supremacy in cryptography, materials science, and atomic-level simulation.