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- W4220984941 abstract "Calculating the ground state properties of a Hamiltonian can be mapped to the problem of finding the ground state of a smaller Hamiltonian through the use of embedding methods. These embedding techniques have the ability to drastically reduce the problem size, and hence the number of qubits required when running on a quantum computer. However, the embedding process can produce a relatively complicated Hamiltonian, leading to a more complex quantum algorithm. In this paper we carry out a detailed study into how density matrix embedding theory (DMET) could be implemented on a quantum computer to solve the Hubbard model. We consider the variational quantum eigensolver (VQE) as the solver for the embedded Hamiltonian within the DMET algorithm. We derive the exact form of the embedded Hamiltonian and use it to construct efficient ansatz circuits and measurement schemes. We conduct detailed numerical simulations up to 16 qubits, the largest to date, for a range of Hubbard model parameters and find that the combination of DMET and VQE is effective for reproducing ground state properties of the model." @default.
- W4220984941 created "2022-04-03" @default.
- W4220984941 creator A5023685398 @default.
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- W4220984941 date "2022-03-14" @default.
- W4220984941 modified "2023-10-17" @default.
- W4220984941 title "Solving the Hubbard model using density matrix embedding theory and the variational quantum eigensolver" @default.
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- W4220984941 doi "https://doi.org/10.1103/physrevb.105.125117" @default.
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