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| Hauptseite > Publikationsdatenbank > Coherent and non-unitary errors in ZZ-generated gates > print |
| 001 | 1040323 | ||
| 005 | 20250310131240.0 | ||
| 024 | 7 | _ | |a 10.1088/2058-9565/ad9be2 |2 doi |
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| 037 | _ | _ | |a FZJ-2025-01837 |
| 041 | _ | _ | |a English |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Müller, Thorge |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Coherent and non-unitary errors in ZZ-generated gates |
| 260 | _ | _ | |a Philadelphia, PA |c 2025 |b IOP Publishing |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a Variational algorithms such as the quantum approximate optimization algorithm have attracted attention due to their potential for solving problems using near-term quantum computers. The ZZ interaction typically generates the primitive two-qubit gate in such algorithms applied for a time, typically a variational parameter, γ. Different compilation techniques exist with respect to the implementation of two-qubit gates. Due to the importance of the ZZ-gate, we present an error analysis comparing the continuous-angle controlled phase gate (CP) against the fixed angle controlled Z-gate (CZ). We analyze both techniques under the influence of coherent over-rotation and depolarizing noise. We show that CP and CZ compilation techniques achieve comparable ZZ-gate fidelities if the incoherent error is below 0.03% and the coherent error is below 0.8%. Thus, we argue that for small coherent and incoherent error a non-parameterized two-qubit gate such as CZ in combination with virtual Z decomposition for single-qubit gates could lead to a significant reduction in the calibration required and, therefore, a less error-prone quantum device. We show that above a coherent error of 0.04π (2%), the CZ gate fidelity depends significantly on γ. |
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| 700 | 1 | _ | |a Stollenwerk, Tobias |0 P:(DE-Juel1)194697 |b 1 |
| 700 | 1 | _ | |a Headley, David |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Epping, Michael |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Wilhelm, Frank K |0 P:(DE-Juel1)184630 |b 4 |
| 773 | _ | _ | |a 10.1088/2058-9565/ad9be2 |g Vol. 10, no. 1, p. 015058 - |0 PERI:(DE-600)2906136-2 |n 1 |p 015058 - |t Quantum science and technology |v 10 |y 2025 |x 2058-9565 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/1040323/files/M%C3%BCller_2025_Quantum_Sci._Technol._10_015058.pdf |y OpenAccess |
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