![]() Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. Our work demonstrates each key aspect of the code and verifies the viability of experimental realisation of quantum error-correcting codes with superconducting qubits.Įrror detection five-qubit code logical operation quantum error-correcting code superconducting qubit. For scalable quantum computation errors occurring during storage and processing need to be continuously corrected. Finally, we realise the decoding circuit and recover the input state with an overall fidelity of, in total with 92 gates. We further implement logical Pauli operations with a fidelity of within the code space. Then, the arbitrary single-qubit errors introduced manually are identified by measuring the stabilisers. we present the first experimental demonstration of a quantum error-correction code able to detect errors and fix them while a computation is taking place as well as demonstrate the ability to. The encoded states are prepared with an average fidelity of while with a high fidelity of in the code space. An experiment shows that errors in quantum computation can be repeatedly corrected on the fly. In the experiment, having optimised the encoding circuit, we employ an array of superconducting qubits to realise the code for several typical logical states including the magic state, an indispensable resource for realising non-Clifford gates. ![]() To address this challenge, we experimentally realise the code, the so-called smallest perfect code that permits corrections of generic single-qubit errors. Despite tremendous experimental efforts in the study of quantum error correction, to date, there has been no demonstration in the realisation of universal quantum error-correcting code, with the subsequent verification of all key features including the identification of an arbitrary physical error, the capability for transversal manipulation of the logical state and state decoding. Quantum error correction is an essential ingredient for universal quantum computing.
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