Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Edifici GAIA, Terrassa, Barcelona, Spain.
Phys Rev Lett. 2010 Dec 31;105(26):264101. doi: 10.1103/PhysRevLett.105.264101. Epub 2010 Dec 22.
Crowd synchrony and quorum sensing arise when a large number of dynamical elements communicate with each other via a common information pool. Previous evidence has shown that this type of coupling leads to synchronization, when coupling is instantaneous and the number of coupled elements is large enough. Here we consider a situation in which the transmission of information between the system components and the coupling pool is not instantaneous. To that end, we model a system of semiconductor lasers optically coupled to a central laser with a delay. Our results show that, even though the lasers are nonidentical due to their distinct optical frequencies, zero-lag synchronization arises. By changing a system parameter, we can switch between two different types of synchronization transition. The dependence of the transition with respect to the delay-coupling parameters is studied.
当大量动态元素通过公共信息池相互通信时，就会出现群体同步和群体感应。之前的证据表明，当耦合是瞬时的，并且耦合元素的数量足够大时，这种类型的耦合会导致同步。在这里，我们考虑一种系统组件和耦合池之间的信息传输不是瞬时的情况。为此，我们对通过延迟光学耦合到中央激光器的半导体激光器系统进行建模。我们的结果表明，尽管由于其不同的光学频率，激光器是非同相的，但仍会出现零延迟同步。通过改变系统参数，我们可以在两种不同类型的同步转变之间进行切换。研究了转变对延迟耦合参数的依赖性。
