Bound state in the continuum and multiple atom state transfer applications in a waveguide QED setup
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908696703926272 |
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| author | Guo, Xiang Zhang, Xiaojun Weng, Mingzhu Bin, Qian Liu, Hao-di Xing, Hai-Jun Lü, Xin-You Wang, Zhihai |
| author_facet | Guo, Xiang Zhang, Xiaojun Weng, Mingzhu Bin, Qian Liu, Hao-di Xing, Hai-Jun Lü, Xin-You Wang, Zhihai |
| contents | Bound states in the continuum (BICs) have been extensively exploited to enhance light--matter interactions in metamaterials, yet their emergence and utility in multi-atom waveguide platforms remain far less explored. Here we study atom--waveguide-dressed BICs in a one-dimensional coupled-resonator waveguide, where two spatially separated atomic arrays couple to distinct resonators with time-dependent strengths. We show that these BICs support a standing-wave photonic mode and enable the transfer of an arbitrary unknown quantum state between the two arrays with fidelities exceeding $99\%$. The protocol remains robust against both disorder and intrinsic dissipation. Our results establish BICs as long-lived resources for high-fidelity quantum information processing in waveguide-QED architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_06365 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Bound state in the continuum and multiple atom state transfer applications in a waveguide QED setup Guo, Xiang Zhang, Xiaojun Weng, Mingzhu Bin, Qian Liu, Hao-di Xing, Hai-Jun Lü, Xin-You Wang, Zhihai Quantum Physics Bound states in the continuum (BICs) have been extensively exploited to enhance light--matter interactions in metamaterials, yet their emergence and utility in multi-atom waveguide platforms remain far less explored. Here we study atom--waveguide-dressed BICs in a one-dimensional coupled-resonator waveguide, where two spatially separated atomic arrays couple to distinct resonators with time-dependent strengths. We show that these BICs support a standing-wave photonic mode and enable the transfer of an arbitrary unknown quantum state between the two arrays with fidelities exceeding $99\%$. The protocol remains robust against both disorder and intrinsic dissipation. Our results establish BICs as long-lived resources for high-fidelity quantum information processing in waveguide-QED architectures. |
| title | Bound state in the continuum and multiple atom state transfer applications in a waveguide QED setup |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2512.06365 |