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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2509.17233 |
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| _version_ | 1866914050363883520 |
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| author | Elghaayda, Samira Mansour, Mostafa |
| author_facet | Elghaayda, Samira Mansour, Mostafa |
| contents | This work introduces a unified theoretical framework for quantum batteries (QBs) constructed from thermally equilibrated arrays of dimeric perylene bisimide (PBI) molecules. These organic dimers, with chemically tunable transition energies and dipole-dipole interactions, constitute a scalable and practical platform for quantum energy storage. Using exact diagonalization of the Gibbs state supported by analytic and numerical resource-theoretic tools, we evaluate four performance metrics: ergotropy, instantaneous charging power, storage capacity, and quantum coherence. We find that exact resonance ($ν_1 = ν_2$) suppresses both ergotropy and charging power due to symmetric thermal population distributions. Introducing finite detuning ($Δ= ν_1 - ν_2$) breaks this symmetry, redistributes populations, and significantly enhances extractable work, charging power, and storage capacity. Furthermore, while the capacity remains invariant under unitary dynamics, providing a useful reference bound, intermediate dipole-dipole coupling strengths ($V_{12}$) optimize the trade-off between ergotropy, coherence retention, and storage performance. Crucially, coherence-assisted energy storage persists up to experimentally relevant temperatures, underscoring the thermal resilience of PBI-based QBs. These results establish spectral detuning and dipole-dipole interaction tuning as essential design principles, positioning PBI dimers as a chemically realistic, experimentally accessible, and thermodynamically robust platform that bridges molecular engineering with quantum energy storage. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_17233 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dimeric perylene-bisimide organic molecules: Application as a quantum battery Elghaayda, Samira Mansour, Mostafa Quantum Physics This work introduces a unified theoretical framework for quantum batteries (QBs) constructed from thermally equilibrated arrays of dimeric perylene bisimide (PBI) molecules. These organic dimers, with chemically tunable transition energies and dipole-dipole interactions, constitute a scalable and practical platform for quantum energy storage. Using exact diagonalization of the Gibbs state supported by analytic and numerical resource-theoretic tools, we evaluate four performance metrics: ergotropy, instantaneous charging power, storage capacity, and quantum coherence. We find that exact resonance ($ν_1 = ν_2$) suppresses both ergotropy and charging power due to symmetric thermal population distributions. Introducing finite detuning ($Δ= ν_1 - ν_2$) breaks this symmetry, redistributes populations, and significantly enhances extractable work, charging power, and storage capacity. Furthermore, while the capacity remains invariant under unitary dynamics, providing a useful reference bound, intermediate dipole-dipole coupling strengths ($V_{12}$) optimize the trade-off between ergotropy, coherence retention, and storage performance. Crucially, coherence-assisted energy storage persists up to experimentally relevant temperatures, underscoring the thermal resilience of PBI-based QBs. These results establish spectral detuning and dipole-dipole interaction tuning as essential design principles, positioning PBI dimers as a chemically realistic, experimentally accessible, and thermodynamically robust platform that bridges molecular engineering with quantum energy storage. |
| title | Dimeric perylene-bisimide organic molecules: Application as a quantum battery |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2509.17233 |