First-principle predictions of fragmentation functions via quantum computing

Abstract:We report on an algorithm to compute fragmentation functions from the first principles Quantum Chromodynamics (QCD) Hamiltonian quantized in Light-Front Gauge, opening a path for digital quantum computers to calculate these longitudinal jet-structure observables. Simulating the behaviour of such computers on a classical cluster (which is memory-limited to about 30 qubits, given the expansive Hilbert spaces of actual quantum computers), we run a demonstration of a heavy-quark leading parton fragmenting into quarkonium, which we benchmark against NRQCD computations. Future quantum computers, perhaps concurrently running with HL-LHC, would have ample opportunity to extract arbitrary parton-hadron combinations.

arXiv:2608.30375 [hep-ph]

(or arXiv:2608.30375v1 [hep-ph] for this version)

https://doi.org/10.48550/arXiv.2608.30375 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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