Response of strongly coupled fermions on classical and quantum computers
arxiv(2024)
摘要
Studying the response of quantum systems is essential for gaining deeper
insights into the fundamental nature of matter and its behavior in diverse
physical contexts. Computation of nuclear response is critical for many
applications, but its spectroscopically accurate description in medium-heavy
nuclei in wide energy ranges remains particularly challenging because of the
complex nature of nuclear quantum states in the high-level-density regime.
Herein, we push the limits of configuration complexity in the classical
computation of the nuclear response and present an algorithm with a quantum
benefit for treating complex configurations. The classical computational method
of approaching spectroscopic accuracy is implemented for medium-heavy nuclei
and pioneered for the dipole response of 120Sn, while the quantum algorithm
reaching the exact solution is realized for the Lipkin Hamiltonian to unravel
the emergence of collectivity at strong coupling.
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