Panagiotis Barkoutsos, Fotios Gkritsis, et al.
APS March Meeting 2020
Arbitrarily long quantum computations require quantum memories that can be repeatedly measured without being corrupted. Here, we preserve the state of a quantum memory, notably with the additional use of flagged error events. All error events were extracted using fast, midcircuit measurements and resets of the physical qubits. Among the error decoders we considered, we introduce a perfect matching decoder that was calibrated from measurements containing up to size-four correlated events. To compare the decoders, we used a partial postselection scheme shown to retain ten times more data than full postselection. We observed logical errors per round of 2.2±0.1×10-2 (decoded without postselection) and 5.1±0.7×10-4 (full postselection), which was less than the physical measurement error of 7×10-3 and therefore surpasses a pseudothreshold for repeated logical measurements.
Panagiotis Barkoutsos, Fotios Gkritsis, et al.
APS March Meeting 2020
Ieva Liepuoniute, Mario Motta, et al.
ACS Fall 2024
Giacomo Nannicini
INFORMS 2022
Kalyan Dasgupta
arXiv