Limits RegistryPUBLIC RECORDLimits RegistryResearch Console →A set of mixed quantum states can be broadcast exactly if and only if the states commute.
The question, scope, and sources behind this Registry record.
Characterize sets of density operators for which one channel can produce a bipartite output having each input state as both marginals.
Current frontiers derived from accepted Claims.
The accepted equality closes this optimization result.
Assertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.