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arXiv:2209.09962 · Physical Review C

Radiative processes on a quantum computer

Paulo F. Bedaque, Ratna Khadka, Gautam Rupak, Muhammad Yusf

Published Mar 7, 2025• 7 citations
arXivHTMLPDF

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.

DOI
10.1103/physrevc.111.034604

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Quantum computers are expected to give major speed-ups for the simulation of quantum systems. In these conference proceedings, we discuss quantum algorithms for the simulation of perturbative Quantum Chromodynamics (QCD) processes. In particular, we describe quantum circuits for simulating the colour part of the interactions of quarks and gluons. We implement our circuits on a simulated noiseless quantum computer and validate them by calculating colour factors for various examples of Feynman diagrams.
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