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Classical reservoir approach for efficient molecular ground state preparation
Zekun He, Dominika Zgid, A. F. Kemper +1
Ground state preparation is a central application of quantum algorithms for electronic structure. We introduce the classical reservoir approach, a low cost variational ansatz tailo…
Efficient Fermi-Hubbard model ground-state preparation by coupling to a classical reservoir in the instantaneous-response limit
Zekun He, Lorenzo Del Re, A. F. Kemper +1
Preparing the ground state of the Fermi-Hubbard model is challenging, in part due to the exponentially large Hilbert space, which complicates efficiently finding a path from an ini…
Hidden local adiabatic ramp in the modulated time evolution and the quantum approximate optimization algorithm
Zekun He, A. F. Kemper, J. K. Freericks
Adiabatic state preparation provides an analytical solution for generating the ground state of a target Hamiltonian, starting from an easily prepared ground state of the initial Ha…
Denoising and Extension of Response Functions in the Time Domain
Alexander F. Kemper, Chao Yang, Emanuel Gull
Response functions of quantum systems, such as electron Green's functions, magnetic, or charge susceptibilities, describe the response of a system to an external perturbation. They…