Quantum-coherent optical isolation and circulation using frequency conversion on a chip
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917135703343104 |
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| author | Hu, Jierui Yuan, Hao Akin, Joshua Fan, Shanhui Fang, Kejie |
| author_facet | Hu, Jierui Yuan, Hao Akin, Joshua Fan, Shanhui Fang, Kejie |
| contents | Breaking optical reciprocity enables new regimes of light--matter interaction with broad implications for fundamental physics and emerging quantum technologies. Although various approaches have been explored to achieve optical nonreciprocity, realizing it at the single-photon level has remained a major challenge. Here, we demonstrate nonmagnetic optical nonreciprocity -- including both isolation and circulation -- in the quantum regime, enabled by efficient and noiseless all-optical frequency conversion on an integrated III-V photonic chip. Our device preserves the quantum coherence and entanglement of the input photons while delivering exceptional performance parameters, including a high extinction ratio of 34 dB, low insertion loss of 0.8 dB, broad bandwidth of 44 GHz, high operational fidelity of 97%, and widely tunable operation wavelength. This realization of quantum optical nonreciprocity in a scalable photonic platform opens a pathway toward directional quantum communication and noise-resilient quantum networks. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_00570 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum-coherent optical isolation and circulation using frequency conversion on a chip Hu, Jierui Yuan, Hao Akin, Joshua Fan, Shanhui Fang, Kejie Optics Quantum Physics Breaking optical reciprocity enables new regimes of light--matter interaction with broad implications for fundamental physics and emerging quantum technologies. Although various approaches have been explored to achieve optical nonreciprocity, realizing it at the single-photon level has remained a major challenge. Here, we demonstrate nonmagnetic optical nonreciprocity -- including both isolation and circulation -- in the quantum regime, enabled by efficient and noiseless all-optical frequency conversion on an integrated III-V photonic chip. Our device preserves the quantum coherence and entanglement of the input photons while delivering exceptional performance parameters, including a high extinction ratio of 34 dB, low insertion loss of 0.8 dB, broad bandwidth of 44 GHz, high operational fidelity of 97%, and widely tunable operation wavelength. This realization of quantum optical nonreciprocity in a scalable photonic platform opens a pathway toward directional quantum communication and noise-resilient quantum networks. |
| title | Quantum-coherent optical isolation and circulation using frequency conversion on a chip |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2511.00570 |