Quantum Error Mitigation Simulates General Non-Hermitian Dynamics
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866910032870768640 |
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| author | Kuji, Hiroki Endo, Suguru Nikuni, Tetsuro Hamazaki, Ryusuke Matsuzaki, Yuichiro |
| author_facet | Kuji, Hiroki Endo, Suguru Nikuni, Tetsuro Hamazaki, Ryusuke Matsuzaki, Yuichiro |
| contents | While non-Hermitian Hamiltonians enable exotic dynamical phenomena, implementing their nonunitary time evolution on near-term quantum devices remains challenging. We propose a hardware-friendly protocol that simulates non-Hermitian dynamics without continuous monitoring. Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) evolution via classical Gaussian white-noise averaging and to subsequently cancel the quantum-jump contribution at the level of the measured observable using stochastic quantum error mitigation (QEM). The scheme requires no ancillas or controlled time-evolution, while the mitigation layer uses only single-qubit operations. We validate the method through numerical simulations of a model with asymmetric hopping, interaction, and disorder. Our work provides a programmable and ancilla-free framework investigating exotic dynamics that are not completely-positive and trace-preserving using QEM. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_21879 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum Error Mitigation Simulates General Non-Hermitian Dynamics Kuji, Hiroki Endo, Suguru Nikuni, Tetsuro Hamazaki, Ryusuke Matsuzaki, Yuichiro Quantum Physics Disordered Systems and Neural Networks While non-Hermitian Hamiltonians enable exotic dynamical phenomena, implementing their nonunitary time evolution on near-term quantum devices remains challenging. We propose a hardware-friendly protocol that simulates non-Hermitian dynamics without continuous monitoring. Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) evolution via classical Gaussian white-noise averaging and to subsequently cancel the quantum-jump contribution at the level of the measured observable using stochastic quantum error mitigation (QEM). The scheme requires no ancillas or controlled time-evolution, while the mitigation layer uses only single-qubit operations. We validate the method through numerical simulations of a model with asymmetric hopping, interaction, and disorder. Our work provides a programmable and ancilla-free framework investigating exotic dynamics that are not completely-positive and trace-preserving using QEM. |
| title | Quantum Error Mitigation Simulates General Non-Hermitian Dynamics |
| topic | Quantum Physics Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2602.21879 |