Phase-enhanced nonreciprocal photon-phonon conversion via coupled optomechanical cavities

Quantum Physics [Submitted on 2 Apr 2026] Phase-enhanced nonreciprocal photon-phonon conversion via coupled optomechanical cavities Divya Mishra, Parvendra Kumar Nonreciprocity, characterized by direction-dependent signal propagation, is fundamental to technologies such as isolators, signal routing, and precision sensing. This letter theoretically demonstrates nonreciprocal phonon transport and the conversion between photon and acoustic phonon signals in coupled optomechanical cavities via phase-dependent driving. It is demonstrated that, in contrast to nonreciprocal phonon transport, which necessitates both dissipation and phase-induced violation of time reversal symmetry, the nonreciprocity in photon-phonon conversion can occur without violating time reversal symmetry. We demonstrate that such nonreciprocity arises due to the path-dependent asymmetry in photon-phonon conversion. Furthermore, we demonstrate that the nonreciprocity of photon-phonon conversion can be further enhanced, achieving isolation levels of up to 40 dB by suitably modifying the phase difference of the driving lasers. Comments: 6 pages, 7 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.01879 [quant-ph]   (or arXiv:2604.01879v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.01879 Focus to learn more Submission history From: Parvendra Kumar [view email] [v1] Thu, 2 Apr 2026 10:38:30 UTC (7,473 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-04 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)