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arXiv 1503.04345physics.opticsnlin.PS
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光学系统中的CP对称性

CP symmetry in optical systems

Brenda Dana, Alon Bahabad, Boris A. Malomed

摘要:

我们引入了一个双芯光波导模型,两个芯中的群速度色散(GVD)符号相反,它们之间的相位速度失配。耦合器嵌入到有源主介质中,其提供两个芯之间的增益-损耗类型的线性耦合。同样的系统可以通过考虑三波在二次非线性介质中的传播而得到,而不需要唯象假设,只要二次谐波泵浦的损耗可以忽略不计。该线性系统提供了电荷宇称($\mathcal{CP}$)对称性的光学实现,而芯内立方非线性的添加破坏了对称性。通过直接模拟和解析近似,证明了线性系统产生扩展的高斯态,而非线性系统产生宽振荡孤子,以及稳定的稳定间隙孤子族。

英文摘要:

We introduce a model of a dual-core optical waveguide with opposite signs of the group-velocity-dispersion (GVD) in the two cores, and a phase-velocity mismatch between them. The coupler is embedded into an active host medium, which provides for the linear coupling of a gain-loss type between the two cores. The same system can be derived, without phenomenological assumptions, by considering the three-wave propagation in a medium with the quadratic nonlinearity, provided that the depletion of the second-harmonic pump is negligible. This linear system offers an optical realization of the charge-parity ($\mathcal{CP}$) symmetry, while the addition of the intra-core cubic nonlinearity breaks the symmetry. By means of direct simulations and analytical approximations, it is demonstrated that the linear system generates expanding Gaussian states, while the nonlinear one gives rise to broad oscillating solitons, as well as a general family of stable stationary gap solitons.

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。

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