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Chirality-induced one-way quantum steering between two waveguide-mediated ferrimagnetic microspheres
Physical Review B ( IF 3.7 ) Pub Date : 2022-09-29 , DOI: 10.1103/physrevb.106.104432 Huiping Zhan, Lihui Sun, Huatang Tan
Physical Review B ( IF 3.7 ) Pub Date : 2022-09-29 , DOI: 10.1103/physrevb.106.104432 Huiping Zhan, Lihui Sun, Huatang Tan
One-way quantum steering is of importance for quantum technologies, such as secure quantum teleportation. In this paper, we study the generation of one-way quantum steering between two distant yttrium iron garnet (YIG) microspheres in chiral waveguide electromagnonics. We consider that the magnon mode with the Kerr nonlinearity in each YIG sphere is chirally coupled to left- and right-propagating guided photons in the waveguide. We find that quantum steering between the magnon modes is absent with nonchirality but is present merely in the form of one way (i.e., one-way steering) when the chirality occurs. The maximal achievable steering is obviously improved as the chirality degree increases. We further find that when the waveguide's outputs are subjected to continuous homodyne detection, the steering can be considerably enhanced and asymmetric steering with strong entanglement can also be achieved by tuning the chirality. Our study shows that chirality can be explored to effectively realize one-way quantum steering. Compared to other studies on achieving asymmetric steering via controlling intrinsic dissipation, e.g., cavity loss rates, our scheme merely depends on the chirality enabled via positioning the micromagnets in the waveguide and is continuously adjustable and experimentally more feasible.
中文翻译:
两个波导介导的亚铁磁微球之间的手性诱导单向量子转向
单向量子转向对于量子技术很重要,例如安全的量子隐形传态。在本文中,我们研究了手性波导电磁学中两个遥远的钇铁石榴石(YIG)微球之间单向量子转向的产生。我们认为每个 YIG 球中具有克尔非线性的磁振子模式手性耦合到波导中的左右传播的引导光子。我们发现非手性不存在磁振子模式之间的量子转向,但当手性发生时仅以一种方式(即单向转向)的形式存在。随着手性程度的增加,最大可实现转向明显提高。我们进一步发现,当波导的输出受到连续零差检测时,转向可以显着增强,并且通过调整手性也可以实现具有强纠缠的不对称转向。我们的研究表明,可以探索手性以有效实现单向量子转向。与通过控制固有耗散(例如腔体损耗率)实现不对称转向的其他研究相比,我们的方案仅依赖于通过将微磁体定位在波导中实现的手性,并且是连续可调的并且在实验上更可行。
更新日期:2022-09-29
中文翻译:
两个波导介导的亚铁磁微球之间的手性诱导单向量子转向
单向量子转向对于量子技术很重要,例如安全的量子隐形传态。在本文中,我们研究了手性波导电磁学中两个遥远的钇铁石榴石(YIG)微球之间单向量子转向的产生。我们认为每个 YIG 球中具有克尔非线性的磁振子模式手性耦合到波导中的左右传播的引导光子。我们发现非手性不存在磁振子模式之间的量子转向,但当手性发生时仅以一种方式(即单向转向)的形式存在。随着手性程度的增加,最大可实现转向明显提高。我们进一步发现,当波导的输出受到连续零差检测时,转向可以显着增强,并且通过调整手性也可以实现具有强纠缠的不对称转向。我们的研究表明,可以探索手性以有效实现单向量子转向。与通过控制固有耗散(例如腔体损耗率)实现不对称转向的其他研究相比,我们的方案仅依赖于通过将微磁体定位在波导中实现的手性,并且是连续可调的并且在实验上更可行。