Quantum-coherent nonlinear interferometry using electron-phonon systems for entanglement-assisted terahertz sensing
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911240400404480 |
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| author | Ogiri, Junya Minamide, Hiroaki Ishida, Kunio |
| author_facet | Ogiri, Junya Minamide, Hiroaki Ishida, Kunio |
| contents | We present a theoretical framework for quantum-coherent nonlinear interferometry in which the nonlinear medium is modeled as active electron-phonon quantum systems rather than a passive $χ^{(2)}$ converter. By explicitly retaining the quantum coherence of the coupled electron-phonon-photon dynamics, our model describes a two-stage buildup of entanglement - first between signal and idler photons and subsequently between idler photons mediated by material coherence. This coherent light-matter interaction imprints the internal dynamics of the medium onto the interferometer output, yielding phase-sensitive interference that enables indirect readout of terahertz-band signal modes via near-infrared detection. The results reveal a route toward entanglement-assisted terahertz sensing and establish a general framework for treating nonlinear quantum media as active components in interferometric architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_26129 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum-coherent nonlinear interferometry using electron-phonon systems for entanglement-assisted terahertz sensing Ogiri, Junya Minamide, Hiroaki Ishida, Kunio Quantum Physics We present a theoretical framework for quantum-coherent nonlinear interferometry in which the nonlinear medium is modeled as active electron-phonon quantum systems rather than a passive $χ^{(2)}$ converter. By explicitly retaining the quantum coherence of the coupled electron-phonon-photon dynamics, our model describes a two-stage buildup of entanglement - first between signal and idler photons and subsequently between idler photons mediated by material coherence. This coherent light-matter interaction imprints the internal dynamics of the medium onto the interferometer output, yielding phase-sensitive interference that enables indirect readout of terahertz-band signal modes via near-infrared detection. The results reveal a route toward entanglement-assisted terahertz sensing and establish a general framework for treating nonlinear quantum media as active components in interferometric architectures. |
| title | Quantum-coherent nonlinear interferometry using electron-phonon systems for entanglement-assisted terahertz sensing |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.26129 |