PPL 093 / 177 permanent IDsPrize Problem Ledger · PPLChecked 2026.07.26
Prize Problem LedgerIndependentPPL 093KCIK #2 · Mutually unbiased bases in dimension 6

Permanent problem IDPPL 093

Renewal checkIndependentexistence

Quantum information

KCIK #2 · Mutually unbiased bases in dimension 6

Find four mutually unbiased bases in dimension 6, or prove that there are no seven mutually unbiased bases in that dimension.

mutually unbiased basesdimension sixlinear algebra
01

The problem

Find four mutually unbiased bases in dimension 6, or prove that there are no seven mutually unbiased bases in that dimension.

Open since2020exact prize formulation
Last checked2026.07.26Catalog verification
02

Reward offers

Offer 01≈€2,026National Quantum Information Centre (KCIK)
Conditional

The standing rule says every unsolved problem automatically reopens for the next year with the same rules and an award equal to that year in euros. The live intake page is stale at €2,023 and a January 2024 deadline, so the €2,026 value is formula-derived and current submission terms must be confirmed with KCIK.

Nominally active under the automatic-renewal clause; 2026 intake details are unconfirmed.

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Sources & reading

1 unique reference linksKCIK Golden Award page