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All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits

Authors :
Marques, J. F.
Ali, H.
Varbanov, B. M.
Finkel, M.
Veen, H. M.
van der Meer, S. L. M.
Valles-Sanclemente, S.
Muthusubramanian, N.
Beekman, M.
Haider, N.
Terhal, B. M.
DiCarlo, L.
Source :
Phys. Rev. Lett. 130, 250602 (2023)
Publication Year :
2023

Abstract

Minimizing leakage from computational states is a challenge when using many-level systems like superconducting quantum circuits as qubits. We realize and extend the quantum-hardware-efficient, all-microwave leakage reduction unit (LRU) for transmons in a circuit QED architecture proposed by Battistel et al. This LRU effectively reduces leakage in the second- and third-excited transmon states with up to $99\% $ efficacy in $220~\mathrm{ns}$, with minimum impact on the qubit subspace. As a first application in the context of quantum error correction, we demonstrate the ability of multiple simultaneous LRUs to reduce the error detection rate and to suppress leakage buildup within $1\%$ in data and ancilla qubits over 50 cycles of a weight-2 parity measurement.<br />Comment: 11 pages, 11 figures, 1 table; typos corrected

Details

Database :
arXiv
Journal :
Phys. Rev. Lett. 130, 250602 (2023)
Publication Type :
Report
Accession number :
edsarx.2302.09876
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevLett.130.250602