Research
Optimal learning of quantum channels in diamond distance
Nature · By Antonio Anna Mele ·
The Brief
- Nature Physics published a paper on the optimal number of uses needed to learn an unknown quantum channel to a given accuracy in diamond distance.
- The paper was published online on 12 November 2026 with DOI 10.1038/s41567-026-03499-7.
- The source is a short abstract excerpt describing quantum channels as models of state evolution, including unitary evolution and measurement.
Why it matters
It establishes a theoretical limit on how many experimental uses are needed to characterise a quantum process precisely, which guides the design of quantum device calibration and verification.
Who’s affected
- quantum information researchers
- experimentalists calibrating quantum devices
- #quantum channels
- #quantum learning
- #diamond distance
- #quantum information
- #quantum physics
Nature Physics, Published online: 12 November 2026; doi:10.1038/s41567-026-03499-7 Quantum channels can be used to describe the evolution of quantum states, including both unitary evolution and measurement. Now the optimal number of uses needed to learn an unknown channel to any…
Timeline
Paper published online in Nature Physics
nature.com
Optimal learning of quantum channels in diamond distance