| Article | |
| Report number | arXiv:2409.12236 |
| Title | Quantum integration of decay rates at second order in perturbation theory |
| Author(s) | de Lejarza, Jorge J. Martínez (Valencia U., IFIC) ; Rentería-Estrada, David F. (Valencia U., IFIC) ; Grossi, Michele (CERN) ; Rodrigo, Germán (Valencia U., IFIC) |
| Publication | 2025-02-12 |
| Imprint | 2024-09-18 |
| Number of pages | 6 |
| Note | 6 pages (5+1), 5 figures, 1 table |
| In: | Quantum Sci. Technol. 10 (2025) 025026 |
| DOI | 10.1088/2058-9565/ada9c5 |
| Subject category | hep-ph ; Particle Physics - Phenomenology ; quant-ph ; General Theoretical Physics |
| Abstract | We present the first quantum computation of a total decay rate in high-energy physics at second order in perturbative quantum field theory. This work underscores the confluence of two recent cutting-edge advances. On the one hand, the quantum integration algorithm Quantum Fourier Iterative Amplitude Estimation (QFIAE), which efficiently decomposes the target function into its Fourier series through a quantum neural network before quantumly integrating the corresponding Fourier components. On the other hand, causal unitary in the loop-tree duality (LTD), which exploits the causal properties of vacuum amplitudes in LTD to coherently generate all contributions with different numbers of final-state particles to a scattering or decay process, leading to singularity-free integrands that are well suited for Fourier decomposition. We test the performance of the quantum algorithm with benchmark decay rates in a quantum simulator and in quantum hardware, and find accurate theoretical predictions in both settings. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2025 The Author(s) (License: CC-BY-4.0) |
Corresponding record in: Inspire
Record created 2024-10-09, last modified 2025-05-10
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