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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.12515 |
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| _version_ | 1866912541284761600 |
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| author | Wampler, Matthew Cooper, Nigel R. |
| author_facet | Wampler, Matthew Cooper, Nigel R. |
| contents | We show how two many-body, generally mixed, quantum states can be swapped via collective, all-to-all interactions. Specifically, we present an experimentally relevant implementation for quantum dots that enables coherent exchange of quantum information between different species of nuclear spins, effectively achieving a perfect swap gate for qudits formed from these different species. This process also serves as a tool for nuclear spin purification. The results are obtained by mapping the problem onto perfect state transfer on a 1D chain. In the partially polarized limit, we demonstrate that the states can be exchanged independently of the initial state. We also assess the robustness of the procedure to decoherence and errors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_12515 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Perfect State Transfer of Mixed States and Purification in Central Spin Systems Wampler, Matthew Cooper, Nigel R. Quantum Physics We show how two many-body, generally mixed, quantum states can be swapped via collective, all-to-all interactions. Specifically, we present an experimentally relevant implementation for quantum dots that enables coherent exchange of quantum information between different species of nuclear spins, effectively achieving a perfect swap gate for qudits formed from these different species. This process also serves as a tool for nuclear spin purification. The results are obtained by mapping the problem onto perfect state transfer on a 1D chain. In the partially polarized limit, we demonstrate that the states can be exchanged independently of the initial state. We also assess the robustness of the procedure to decoherence and errors. |
| title | Perfect State Transfer of Mixed States and Purification in Central Spin Systems |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2508.12515 |