Quantum Simulation of Nuclear Linear Response

It presents a quantum algorithm for efficiently computing the response of an atomic nucleus to a small external electromagnetic perturbation. Specifically, the system's Hamiltonian is modeled as a harmonic oscillator, and the linear combination of unitaries (LCU) approach is employed to simulate the Hamiltonian on a quantum computer. We use the SWAP test to compute the dipole response for 120 Sn and find excellent agreement between the quantum algorithm results and experimental data, compared to conventional linear response theory. Overall, our approach presents a promising advancement in the field of quantum computing and may have significant implications for studying the response of complex physical systems to external perturbations.