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| 001 | 1046963 | ||
| 005 | 20251007202036.0 | ||
| 024 | 7 | _ | |a 10.1103/PhysRevA.111.062610 |2 doi |
| 024 | 7 | _ | |a 2469-9926 |2 ISSN |
| 024 | 7 | _ | |a 2469-9942 |2 ISSN |
| 024 | 7 | _ | |a 2469-9934 |2 ISSN |
| 024 | 7 | _ | |a 10.34734/FZJ-2025-04031 |2 datacite_doi |
| 037 | _ | _ | |a FZJ-2025-04031 |
| 041 | _ | _ | |a English |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Bishop, Gino |0 P:(DE-Juel1)185635 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a Quantum algorithm for Green's-function measurements in the Fermi-Hubbard model |
| 260 | _ | _ | |a Woodbury, NY |c 2025 |b Inst. |
| 336 | 7 | _ | |a article |2 DRIVER |
| 336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1759845072_9312 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a In the framework of the hybrid quantum-classical variational cluster approach to strongly correlated electron systems one of the goals of a quantum subroutine is to find single-particle correlation functions of lattice fermions in polynomial time. Previous works suggested to use variants of the Hadamard test for this purpose, which requires an implementation of controlled single-particle fermionic operators. However, for a number of locality-preserving mappings to encode fermions into qubits, a direct construction of such operators is not possible. In this work, we propose a quantum algorithm that uses an analog of the Kubo formula adapted to a quantum circuit simulating the Hubbard model. It allows to access the Green's function of a cluster directly using only bilinears of fermionic operators and circumvents the usage of the Hadamard test. We test our algorithm in practice by using open-access simulators of noisy IBM superconducting chips. |
| 536 | _ | _ | |a 5223 - Quantum-Computer Control Systems and Cryoelectronics (POF4-522) |0 G:(DE-HGF)POF4-5223 |c POF4-522 |f POF IV |x 0 |
| 588 | _ | _ | |a Dataset connected to CrossRef, Journals: juser.fz-juelich.de |
| 700 | 1 | _ | |a Bagrets, Dmitry |0 P:(DE-Juel1)194613 |b 1 |u fzj |
| 700 | 1 | _ | |a Wilhelm, Frank K. |0 P:(DE-HGF)0 |b 2 |
| 773 | _ | _ | |a 10.1103/PhysRevA.111.062610 |g Vol. 111, no. 6, p. 062610 |0 PERI:(DE-600)2844156-4 |n 6 |p 062610 |t Physical review / A |v 111 |y 2025 |x 2469-9926 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/1046963/files/PhysRevA.111.062610.pdf |y OpenAccess |
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