0002102155 2026-04-30 2026-04-30 0002102155 cik0002102155:UnitsEachConsistingOfOneClassOrdinaryShareAndOneRedeemableWarrantMember 2026-04-30 2026-04-30 0002102155 cik0002102155:ClassOrdinarySharesParValue0.0001PerShareMember 2026-04-30 2026-04-30 0002102155 cik0002102155:WarrantsEachExercisableForOneClassOrdinaryShareAndConversionOfAnyWorkingCapitalLoansIntoEquityIfElectedBySponsorMember 2026-04-30 2026-04-30 false --12-31 0002102155 00-0000000 8-K 2026-04-30 Quantum Leap Acquisition Corp E9 001-43262 Willow Workplace Menlo Park 80 Willow Road Menlo Park CA 94025 650 444-4105 false false false false Units, each consisting of one Class A ordinary share and one redeemable warrant QLEPU NYSE Class A ordinary shares, par value $0.0001 per share QLEP NYSE Warrants, each exercisable for one Class A ordinary share, and the conversion of any working capital loans into equity, if elected by the Sponsor QLEPW NYSE true false