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Radiative processes on a quantum computer
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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 with 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 follows simply in the near resonance case. We demonstrate the feasibility of the method by using it in actual quantum computations and simulations of simple systems.
Forward citations
Cited by 2 Pith papers
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Iterative Harrow-Hassidim-Lloyd quantum algorithm for solving resonances with eigenvector continuation
An iterative HHL algorithm with eigenvector continuation and complex scaling computes alpha-alpha resonance energies, converging in a handful of iterations in a simulated 8x8 model.
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Studying few cluster resonances with quantum neural network driven iterative Harrow-Hassidim-Lloyd algorithm
A quantum neural network generates eigenvector-continuation basis states, and an iterative HHL routine solves the resulting generalized eigenvalue problem for the 4+ resonance of 9ΛBe.
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