← Open problems
MUB-10.1
Show that no complete set of seven MU bases exists when d = 6.
In plain terms
The headline question of the whole field: is dimension six really missing its complete set of mutually unbiased bases?
Our position — ours alone, not the authors'
This is the goal, not a target. Nothing we own reduces it. Listed for orientation only.
Source
Daniel McNulty, Stefan Weigert, Mutually Unbiased Bases in Composite Dimensions -- A Review
Quantum 10, 2051 (2026) · §10.2
https://doi.org/10.22331/q-2026-04-01-2051
Licence:
CC-BY-4.0
— the problem statement is quoted here under that
licence, with attribution, and has not been modified