Engineering the uncontrollable: Steering noisy spin-correlated radical-pairs with coherent and incoherent control
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866909991321993216 |
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| author | Chowdhury, Farhan T. Smith, Luke D. Kattnig, Daniel R. |
| author_facet | Chowdhury, Farhan T. Smith, Luke D. Kattnig, Daniel R. |
| contents | The quantum control of spin-correlated radical pairs (SCRPs) holds promise for the targeted manipulation of magnetic field effects, with potential applications ranging from the design of noise-resilient quantum information processors to genetically encodable quantum sensors. However, achieving precise handles over the intricate interplay between coherent electron spin dynamics and incoherent relaxation processes in photoexcited radical-pair reactions requires tractable approaches for numerically obtaining controls for large, complex open quantum systems. Employing techniques relying on full Liouville-space propagators becomes computationally infeasible for large spin systems of realistic complexity. Here, we demonstrate how a control engineering approach based on the Pontryagin Maximum Principle (PMP) can offer a viable alternative by reporting on the successful application of PMP-optimal control to steer the coherent and incoherent spin dynamics of noisy radical pairs. This enables controls for prototypical radical-pair models that exhibit robustness in the face of relevant noise sources and paves the way to incoherent control of radical-pair spin dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_05074 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Engineering the uncontrollable: Steering noisy spin-correlated radical-pairs with coherent and incoherent control Chowdhury, Farhan T. Smith, Luke D. Kattnig, Daniel R. Quantum Physics Biological Physics Chemical Physics The quantum control of spin-correlated radical pairs (SCRPs) holds promise for the targeted manipulation of magnetic field effects, with potential applications ranging from the design of noise-resilient quantum information processors to genetically encodable quantum sensors. However, achieving precise handles over the intricate interplay between coherent electron spin dynamics and incoherent relaxation processes in photoexcited radical-pair reactions requires tractable approaches for numerically obtaining controls for large, complex open quantum systems. Employing techniques relying on full Liouville-space propagators becomes computationally infeasible for large spin systems of realistic complexity. Here, we demonstrate how a control engineering approach based on the Pontryagin Maximum Principle (PMP) can offer a viable alternative by reporting on the successful application of PMP-optimal control to steer the coherent and incoherent spin dynamics of noisy radical pairs. This enables controls for prototypical radical-pair models that exhibit robustness in the face of relevant noise sources and paves the way to incoherent control of radical-pair spin dynamics. |
| title | Engineering the uncontrollable: Steering noisy spin-correlated radical-pairs with coherent and incoherent control |
| topic | Quantum Physics Biological Physics Chemical Physics |
| url | https://arxiv.org/abs/2510.05074 |