Frumkin Valeri, Bush John W M, Papatryfonos Konstantinos
Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Gulliver UMR CNRS 7083, ESPCI Paris, Université PSL, 75005 Paris, France.
Phys Rev Lett. 2023 Feb 10;130(6):064002. doi: 10.1103/PhysRevLett.130.064002.
Superradiance occurs when a collection of atoms exhibits a cooperative, spontaneous emission of photons at a rate that exceeds that of its component parts. Here, we reveal a similar phenomenon in a hydrodynamic system consisting of a pair of vibrationally excited cavities, coupled through their common wave field, that spontaneously emit droplets via interfacial fracture. We show that the droplet emission rate of two coupled cavities is higher than the emission rate of two isolated cavities. Moreover, the amplified emission rate varies sinusoidally with distance between the cavities, as is characteristic of superradiance. We thus present a hydrodynamic phenomenon that captures several essential features of superradiance in optical systems.
当一群原子以超过其组成部分的速率表现出协同、自发的光子发射时，就会发生超辐射。在此，我们在一个流体动力学系统中揭示了一种类似现象，该系统由一对通过共同波场耦合的振动激发腔组成，它们通过界面破裂自发地发射液滴。我们表明，两个耦合腔的液滴发射速率高于两个孤立腔的发射速率。此外，放大的发射速率随腔之间的距离呈正弦变化，这是超辐射的特征。因此，我们展示了一种流体动力学现象，它捕捉了光学系统中超辐射的几个基本特征。
