PPL 095 / 177 permanent IDsPrize Problem Ledger · PPLChecked 2026.07.26
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Prize Problem LedgerIndependentPPL 095KCIK #5 · Two-copy non-distillability

Permanent problem IDPPL 095

Renewal checkIndependentconjecture

Quantum information

KCIK #5 · Two-copy non-distillability

Show that the symmetric two-ququart Werner state whose partial transpose is proportional to a unitary operator is two-copy non-distillable.

Werner statesdistillabilityququarts
01

The problem

Show that the symmetric two-ququart Werner state whose partial transpose is proportional to a unitary operator is two-copy non-distillable.

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.

Award source ↗Rules ↗
03

Sources & reading

1 unique reference linksKCIK Golden Award page
04

Related open targets

Quantum informationKCIK #1 · SIC-POVM dimensionsPPL 092 · ≈€2,026 · 6 years openQuantum informationKCIK #2 · Mutually unbiased bases in dimension 6PPL 093 · ≈€2,026 · 6 years openQuantum informationKCIK #4 · NPT bound entanglementPPL 094 · ≈€2,026 · 6 years open