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Radiative processes on a quantum computer
Phys. Rev. C 111, 034604 – Published 7 March, 2025
DOI: https://doi.org/10.1103/PhysRevC.111.034604
Abstract
Radiative processes, where a photon/neutrino is emitted as a result of a collision or decay of a particle, play a central role in atomic, nuclear, and particle physics. Their rate is determined by certain off-diagonal matrix elements between different initial and final states. We propose a method to compute them using quantum computers. It relies on a single extra qubit that, in a certain sense, represents the photon/neutrino. The generic formula relating this matrix element to the amplitude and frequency of oscillations of the extra qubit is derived for the near-resonance case. We demonstrate the feasibility of the method by using it in actual quantum computations and simulations of simple systems.
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