Zero-lag synchronization of chaotic units with time-delayed couplings

¹  Minerva Center and Department of Physics, Bar-Ilan University - Ramat-Gan, 52900 Israel
²  Institute for Theoretical Physics, University of Würzburg - Am Hubland, 97074 Würzburg, Germany, EU

Received: 17 December 2008
Accepted: 6 March 2009

Abstract

Zero-lag synchronization (ZLS) is achieved in a very restricted mutually coupled chaotic systems, where the delays of the self-coupling and the mutual coupling are identical or fulfil some restricted ratios. Using a set of multiple self-feedbacks and mutual couplings we demonstrate both analytically and numerically that ZLS is achieved for a wide range of mutual delays. It indicates that ZLS can be achieved without the knowledge of the mutual distance between the communicating partners and has an important implication in the possible use of ZLS in communications networks as well as in the understanding of the emergence of such synchronization in the neuronal activities.