Inhomogeneous Light-Matter Coupling as a Resource for Noiseless Quantum Memory
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866916049264312320 |
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| author | Hanamura, Fumiya Bao, Sicheng Yoo, Jie Lerk Auffèves, Alexia Touzard, Steven |
| author_facet | Hanamura, Fumiya Bao, Sicheng Yoo, Jie Lerk Auffèves, Alexia Touzard, Steven |
| contents | Inhomogeneous ensembles of two-level systems are important for both fundamental light-matter physics and quantum-network applications. Here we develop a general waveguide model that provides an intuitive and analytical description of collective dynamics in such systems by mapping the subradiant modes to an effective waveguide with well-defined input-output relations. For echo-based quantum memories, the model reveals the physical origin of noisy-echo suppression by adiabatic pulses and shows that inhomogeneous light-matter coupling can be harnessed as a resource for noiseless storage. For entanglement generation, the same mechanism exposes a previously unexplored limitation of robust control pulses and leads to a new composite-pulse protocol that overcomes it. These results establish the waveguide model as a practical bridge between fundamental collective physics and quantum-network protocol design, with direct implications for high-fidelity memories and robust entanglement generation in inhomogeneous ensembles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26783 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Inhomogeneous Light-Matter Coupling as a Resource for Noiseless Quantum Memory Hanamura, Fumiya Bao, Sicheng Yoo, Jie Lerk Auffèves, Alexia Touzard, Steven Quantum Physics Inhomogeneous ensembles of two-level systems are important for both fundamental light-matter physics and quantum-network applications. Here we develop a general waveguide model that provides an intuitive and analytical description of collective dynamics in such systems by mapping the subradiant modes to an effective waveguide with well-defined input-output relations. For echo-based quantum memories, the model reveals the physical origin of noisy-echo suppression by adiabatic pulses and shows that inhomogeneous light-matter coupling can be harnessed as a resource for noiseless storage. For entanglement generation, the same mechanism exposes a previously unexplored limitation of robust control pulses and leads to a new composite-pulse protocol that overcomes it. These results establish the waveguide model as a practical bridge between fundamental collective physics and quantum-network protocol design, with direct implications for high-fidelity memories and robust entanglement generation in inhomogeneous ensembles. |
| title | Inhomogeneous Light-Matter Coupling as a Resource for Noiseless Quantum Memory |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.26783 |