Characterizing errors for Quantum Fourier Transform on IBM Q


  • Carolina Allende Universidad ORT Uruguay
  • André Fonseca de Oliveira Universidad ORT Uruguay
  • Efrain Buksman Universidad ORT Uruguay



Quantum Fourier transform, quantum error correction, IBM quantum


The performance of today's quantum computers are affected by noise. This effect can be analyzed in the result of simple quantum algorithms in real quantum computers. The noise can be characterized as a decoherence error or a systematic error, the last could be corrected by a unitary rotation.
In this article we propose two methods to model a systematic error, in the Quantum Fourier Transform algorithm (QFT). The first method uses the isotropic index presented in ``  [1] and needs to reconstruct the density matrix of the experimental state, while the second method, although less general, only needs to reconstruct the reduced density matrices for each qubit.
In both methods, a unitary transformation is proposed, which approximates the experimental result to the expected theoretical state. As an example, the QFT algorithm is analyzed for two qubit states, in quantum IBM Q computer ibmq\_santiago.

Author Biography

Efrain Buksman, Universidad ORT Uruguay

Department of Engineering


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How to Cite

C. . Allende, A. . Fonseca de Oliveira, and E. Buksman, “Characterizing errors for Quantum Fourier Transform on IBM Q”, Rev. Mex. Fís., vol. 68, no. 3 May-Jun, pp. 031402 1–, May 2022.



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