The perfect flaw: how a diamond defect is changing quantum physics:
A new study in Nature Physics has turned an old problem on its head by reporting a way to use ...
thehindu.com/sci-tech/science/nitrogen-vacancy-centres-diamond-quantum-spins-superradiant-maser/article70472909.ece
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engineering.princeton.edu/news/2025/11/26/diamond-defects-now-pairs-reveal-hidden-fluctuations-quantum-world
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Key FactsPLANAR Lowers Logical Quantum Errors in Tests
Jun 19, 2025 · Reading time: ~45 sec.
Summary created with AI assistance · Source: phys.org
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).
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