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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2309.10552 |
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| _version_ | 1866916582286950400 |
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| author | Hémery, Kévin Ghanem, Khaldoon Crane, Eleanor Campbell, Sara L. Dreiling, Joan M. Figgatt, Caroline Foltz, Cameron Gaebler, John P. Johansen, Jacob Mills, Michael Moses, Steven A. Pino, Juan M. Ransford, Anthony Rowe, Mary Siegfried, Peter Stutz, Russell P. Dreyer, Henrik Schuckert, Alexander Nigmatullin, Ramil |
| author_facet | Hémery, Kévin Ghanem, Khaldoon Crane, Eleanor Campbell, Sara L. Dreiling, Joan M. Figgatt, Caroline Foltz, Cameron Gaebler, John P. Johansen, Jacob Mills, Michael Moses, Steven A. Pino, Juan M. Ransford, Anthony Rowe, Mary Siegfried, Peter Stutz, Russell P. Dreyer, Henrik Schuckert, Alexander Nigmatullin, Ramil |
| contents | Calculating the equilibrium properties of condensed matter systems is one of the promising applications of near-term quantum computing. Recently, hybrid quantum-classical time-series algorithms have been proposed to efficiently extract these properties from a measurement of the Loschmidt amplitude $\langle ψ| e^{-i \hat H t}|ψ\rangle$ from initial states $|ψ\rangle$ and a time evolution under the Hamiltonian $\hat H$ up to short times $t$. In this work, we study the operation of this algorithm on a present-day quantum computer. Specifically, we measure the Loschmidt amplitude for the Fermi-Hubbard model on a $16$-site ladder geometry (32 orbitals) on the Quantinuum H2-1 trapped-ion device. We assess the effect of noise on the Loschmidt amplitude and implement algorithm-specific error mitigation techniques. By using a thus-motivated error model, we numerically analyze the influence of noise on the full operation of the quantum-classical algorithm by measuring expectation values of local observables at finite energies. Finally, we estimate the resources needed for scaling up the algorithm. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_10552 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Measuring the Loschmidt amplitude for finite-energy properties of the Fermi-Hubbard model on an ion-trap quantum computer Hémery, Kévin Ghanem, Khaldoon Crane, Eleanor Campbell, Sara L. Dreiling, Joan M. Figgatt, Caroline Foltz, Cameron Gaebler, John P. Johansen, Jacob Mills, Michael Moses, Steven A. Pino, Juan M. Ransford, Anthony Rowe, Mary Siegfried, Peter Stutz, Russell P. Dreyer, Henrik Schuckert, Alexander Nigmatullin, Ramil Quantum Physics Calculating the equilibrium properties of condensed matter systems is one of the promising applications of near-term quantum computing. Recently, hybrid quantum-classical time-series algorithms have been proposed to efficiently extract these properties from a measurement of the Loschmidt amplitude $\langle ψ| e^{-i \hat H t}|ψ\rangle$ from initial states $|ψ\rangle$ and a time evolution under the Hamiltonian $\hat H$ up to short times $t$. In this work, we study the operation of this algorithm on a present-day quantum computer. Specifically, we measure the Loschmidt amplitude for the Fermi-Hubbard model on a $16$-site ladder geometry (32 orbitals) on the Quantinuum H2-1 trapped-ion device. We assess the effect of noise on the Loschmidt amplitude and implement algorithm-specific error mitigation techniques. By using a thus-motivated error model, we numerically analyze the influence of noise on the full operation of the quantum-classical algorithm by measuring expectation values of local observables at finite energies. Finally, we estimate the resources needed for scaling up the algorithm. |
| title | Measuring the Loschmidt amplitude for finite-energy properties of the Fermi-Hubbard model on an ion-trap quantum computer |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2309.10552 |