Persistent coherent quantum dynamics in 2D long-range magnets via magnon binding
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911523993026560 |
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| author | Naik, Vighnesh Dattatraya Heyl, Markus |
| author_facet | Naik, Vighnesh Dattatraya Heyl, Markus |
| contents | The dynamics of 2D long-range quantum magnets represents a current frontier in experimental physics such as in Rydberg atomic systems or trapped ions. In this work we address theoretical challenges in understanding these dynamics by combining large-scale neural quantum state simulations with an effective theory. Our findings uncover a mechanism for persistent coherent quantum dynamics and slow relaxation in 2D long-range quantum magnets. Demonstrated on the 2D transverse-field quantum Ising model with power-law decaying interactions, we observe long-lived oscillatory behavior after quenching the system from a ferromagnetic product state. We explain this phenomenon by the formation of magnon bound states, generated by effective attractive long-range magnon interactions. Our results highlight a generic mechanism for long-lived quantum coherence in 2D quantum magnets that can be directly observed in current quantum simulation platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09037 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Persistent coherent quantum dynamics in 2D long-range magnets via magnon binding Naik, Vighnesh Dattatraya Heyl, Markus Quantum Physics Statistical Mechanics The dynamics of 2D long-range quantum magnets represents a current frontier in experimental physics such as in Rydberg atomic systems or trapped ions. In this work we address theoretical challenges in understanding these dynamics by combining large-scale neural quantum state simulations with an effective theory. Our findings uncover a mechanism for persistent coherent quantum dynamics and slow relaxation in 2D long-range quantum magnets. Demonstrated on the 2D transverse-field quantum Ising model with power-law decaying interactions, we observe long-lived oscillatory behavior after quenching the system from a ferromagnetic product state. We explain this phenomenon by the formation of magnon bound states, generated by effective attractive long-range magnon interactions. Our results highlight a generic mechanism for long-lived quantum coherence in 2D quantum magnets that can be directly observed in current quantum simulation platforms. |
| title | Persistent coherent quantum dynamics in 2D long-range magnets via magnon binding |
| topic | Quantum Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2512.09037 |