arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2102.02719quant-phcond-mat.quant-gasphysics.optics
收藏

有反馈的发射极-波导系统中的动力学相位和量子关联

Dynamical phases and quantum correlations in an emitter-waveguide system with feedback

Giuseppe Buonaiuto, Federico Carollo, Beatriz Olmos, Igor Lesanovsky

摘要:

我们利用极小模型研究了在发射极-波导系统中利用反馈产生和控制突现集体行为和量子关联。采用零差检测从激光驱动的发射器系综发射到波导的模式中的光子允许产生复杂的动态相位。特别是,我们展示了时间晶体相的出现,其转变由反馈强度控制。反馈还可以控制多体量子关联,这在发射体系综的自旋压缩中变得明显。发展涨落算符动力学的理论,我们讨论了反馈强度如何控制压缩,并研究了它的时间动力学和对系统大小的依赖。很大程度上的分析结果允许量化的自旋压缩和波动的限制,大量的发射器,揭示了临界缩放的压缩接近过渡到时间晶体。我们的研究证实了集成发射器波导系统的潜力-具有高度可控的光子发射通道-用于探索集体量子现象和产生资源,如压缩态,用于量子增强计量学。

英文摘要:

We investigate the creation and control of emergent collective behavior and quantum correlations using feedback in an emitter-waveguide system using a minimal model. Employing homodyne detection of photons emitted from a laser-driven emitter ensemble into the modes of a waveguide allows to generate intricate dynamical phases. In particular, we show the emergence of a time-crystal phase, the transition to which is controlled by the feedback strength. Feedback enables furthermore the control of many-body quantum correlations, which become manifest in spin squeezing in the emitter ensemble. Developing a theory for the dynamics of fluctuation operators we discuss how the feedback strength controls the squeezing and investigate its temporal dynamics and dependence on system size. The largely analytical results allow to quantify spin squeezing and fluctuations in the limit of large number of emitters, revealing critical scaling of the squeezing close to the transition to the time-crystal. Our study corroborates the potential of integrated emitter-waveguide systems -- which feature highly controllable photon emission channels -- for the exploration of collective quantum phenomena and the generation of resources, such as squeezed states, for quantum enhanced metrology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑