2023
DOI: 10.4236/jamp.2023.112034
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Quantum Codes Do Not Increase Fidelity against Isotropic Errors

Abstract: In this article, we study the ability of error-correcting quantum codes to increase the fidelity of quantum states throughout a quantum computation. We analyze arbitrary quantum codes that encode all qubits involved in the computation, and we study the evolution of n-qubit fidelity from the end of one application of the correcting circuit to the end of the next application. We assume that the correcting circuit does not introduce new errors, that it does not increase the execution time (i.e. its application ta… Show more

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