Jun 19 25

From spin glasses to quantum codes: Researchers develop optimal error correction algorithm

phys.org/news/2025-06-glasses-quantum-codes-optimal-error.html

PLANAR Lowers Logical Quantum Errors in Tests

Google quantum-memory data showed a 25% error reduction and raised the suppression factor from approximately 8.11 to 8.28.

Key FactsJun 19, 2025 · Reading time: ~45 sec.
Summary created with AI assistance · Source: phys.org

PLANAR provides the first exact maximum-likelihood decoder with polynomial complexity for repetition codes under circuit-level noise.

The researchers attributed one-quarter of the error floor to decoding rather than hardware.

Using synthetic noise models, PLANAR established exact thresholds of 6.7% for depolarizing and 2.0% for SI1000 noise.

On their 72-qubit chip, PLANAR improved logical error rates by up to 8.76% compared with standard decoders.

This suboptimality masked hardware performance and contributed to unaccounted error floors.
— The researchers explained this statement, citing the impact of suboptimal decoding on hardware performance and unaccounted error floors (Pan, Zhang, Xu).

Story Details

Last Updated
Total Articles	1

Main Topics

correction

#correction

subsequent remediation of an erroneous object

Robot

#robot

mechanical or virtual artificial agent carrying out physical activities, which can be guided by an external control device or the control may be embedded within