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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.12465 |
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| _version_ | 1866918445887520768 |
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| author | Aumann, Philipp Fellner, Michael Alber, David Cykiert, Max Fleckenstein, Christoph ter Hoeven, Roeland Stenzel, Leo Valencia-Tortora, Riccardo J. Lechner, Wolfgang |
| author_facet | Aumann, Philipp Fellner, Michael Alber, David Cykiert, Max Fleckenstein, Christoph ter Hoeven, Roeland Stenzel, Leo Valencia-Tortora, Riccardo J. Lechner, Wolfgang |
| contents | We demonstrate the Parity Architecture on quantum hardware, using the quantum Fourier transform (QFT) as a benchmark. As a result, a record performance in both fidelity and qubit count is achieved using quantum processors with a native CZ-based instruction set. On the IBM Heron r3 chip, a process fidelity of the QFT algorithm of ${F \approx 10^{-2}}$ for ${N=50}$ qubits is achieved. The scaling of the speedup compared to previous swap-based methods is super-exponential $\mathcal{O}(\exp(N^2))$. Furthermore, we show that the scaling can be improved further by including iSWAP gates in the instruction set. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_12465 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Demonstrating Record Fidelity for the Quantum Fourier Transform Aumann, Philipp Fellner, Michael Alber, David Cykiert, Max Fleckenstein, Christoph ter Hoeven, Roeland Stenzel, Leo Valencia-Tortora, Riccardo J. Lechner, Wolfgang Quantum Physics We demonstrate the Parity Architecture on quantum hardware, using the quantum Fourier transform (QFT) as a benchmark. As a result, a record performance in both fidelity and qubit count is achieved using quantum processors with a native CZ-based instruction set. On the IBM Heron r3 chip, a process fidelity of the QFT algorithm of ${F \approx 10^{-2}}$ for ${N=50}$ qubits is achieved. The scaling of the speedup compared to previous swap-based methods is super-exponential $\mathcal{O}(\exp(N^2))$. Furthermore, we show that the scaling can be improved further by including iSWAP gates in the instruction set. |
| title | Demonstrating Record Fidelity for the Quantum Fourier Transform |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.12465 |