Accessing and manipulating dispersive shock waves in a nonlinear and nonlocal Rydberg medium
Accessing and manipulating dispersive shock waves in a nonlinear and nonlocal Rydberg medium
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DOI：
10.1103/physreva.107.033503
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发表时间：
2022-10
影响因子：
2.9
通讯作者：
C. Hang;Zhengyang Bai;Weibin Li;A. Kamchatnov;Guoxiang Huang
中科院分区：
文献类型：
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作者：
C. Hang;Zhengyang Bai;Weibin Li;A. Kamchatnov;Guoxiang Huang
色散冲击波是介质中非线性色散（或衍射）引起的一种有趣的波动现象。创造低发电功率的DSW并实现其主动控制是可取的，但仍然是一个长期的挑战。在此，我们提出了一个方案，以产生弱光DSW和实现其操作的原子气体中涉及强相互作用的里德堡态的条件下的电磁诱导透明（EIT）。我们发现，对于二维（2D）里德伯气体的光学克尔非线性的弱非局域性可以显着改变的边缘速度的DSW和诱导的边缘速度的奇异行为，因此不稳定的DSW。然而，通过增加克尔非局域性的程度，可以抑制边缘速度的奇异行为和不稳定性的DSW。我们还表明，在三维里德堡气体中，当系统工作在中间非定域区时，可以产生并稳定传播DSW。由于EIT效应和Rydberg-Rydberg相互作用引起的巨大的非局域克尔非线性效应，我们发现的DSW具有极低的产生功率。此外，可以实现DSW的主动控制;特别地，可以通过关闭和打开控制激光场来以高效率和保真度存储和检索DSW。这里报道的结果是有用的，不仅为揭示有趣的物理DSWs，但也为寻找有前途的应用程序的非线性和非局域里德伯介质。
Dispersive shock waves (DSWs) are fascinating wave phenomena occurring in media when nonlinearity overwhelms dispersion (or diffraction). Creating DSWs with low generation power and realizing their active controls is desirable but remains a longstanding challenge. Here, we propose a scheme to generate weak-light DSWs and realize their manipulations in an atomic gas involving strongly interacting Rydberg states under the condition of electromagnetically induced transparency (EIT). We show that for a two-dimensional (2D) Rydberg gas a weak nonlocality of optical Kerr nonlinearity can significantly change the edge speed of DSWs and induces a singular behavior of the edge speed and hence an instability of the DSWs. However, by increasing the degree of the Kerr nonlocality, the singular behavior of the edge speed and the instability of the DSWs can be suppressed. We also show that in a 3D Rydberg gas, DSWs can be created and propagate stably when the system works in the intermediate nonlocality regime. Due to the EIT effect and the giant nonlocal Kerr nonlinearity contributed by the Rydberg-Rydberg interaction, DSWs found here have extremely low generation power. In addition, an active control of DSWs can be realized; in particular, they can be stored and retrieved with high efficiency and fidelity through switching off and on a control laser field. The results reported here are useful not only for unveiling intriguing physics of DSWs but also for finding promising applications of nonlinear and nonlocal Rydberg media.