Xu Gang, Conforti Matteo, Kudlinski Alexandre, Mussot Arnaud, Trillo Stefano
Univ. Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers Atomes et Molécules, F-59000 Lille, France.
Department of Engineering, University of Ferrara, Via Saragat 1, 44122 Ferrara, Italy.
Phys Rev Lett. 2017 Jun 23;118(25):254101. doi: 10.1103/PhysRevLett.118.254101. Epub 2017 Jun 20.
We investigate the temporal photonic analogue of the dam-break phenomenon for shallow water by exploiting a fiber optics setup. We clearly observe the decay of the steplike input (photonic dam) into a pair of oppositely propagating rarefaction wave and dispersive shock wave. Our results show evidence for a critical transition of the dispersive shock into a self-cavitating state. The detailed observation of the cavitating state dynamics allows for a fully quantitative test of the Whitham modulation theory applied to the universal defocusing nonlinear Schrödinger equation.
我们通过利用光纤装置研究了浅水波溃坝现象的时间光子模拟。我们清晰地观察到阶梯状输入（光子坝）衰减为一对反向传播的稀疏波和色散冲击波。我们的结果显示了色散冲击波向自空化状态的临界转变的证据。对空化状态动力学的详细观察使得能够对应用于通用散焦非线性薛定谔方程的惠特姆调制理论进行完全定量的检验。
