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Delay or anticipatory synchronization in one-way coupled systems using variable delay with reset

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Abstract

We present a mechanism for the synchronization of one-way coupled nonlinear systems in which the coupling uses a variable delay, that is reset at finite intervals. Here the delay varies in the same way as the system in time and so the coupling function remains constant for the reset interval at the end of which it is reset to the value at that time. This leads to a novel and discrete error dynamics and the resulting general stability analysis is applicable to chaotic or hyperchaotic systems. We apply this method to standard chaotic systems and hyperchaotic time delay systems. The results of the detailed numerical analysis agree with the results from stability analysis in both cases. This method has the advantage that it is cost-effective since information from the driving system is needed only at intervals of reset. Further, in the context of time delay systems, optimization among the different time-scales depending upon the application is possible due to the flexibility among the four different time-scales in our method, viz. delay in the driving system, anticipation in the response system, system delay time and reset time. We suggest a bi-channel scheme for implementing this method in communication field with enhanced security.

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Science Education and Research, Pune, 411 021, India

    G AMBIKA

  2. Physical Research Laboratory, Ahmedabad, 380 009, India

    R E Amritkar

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  1. G AMBIKA
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  2. R E Amritkar
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Correspondence to G AMBIKA.

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AMBIKA, G., Amritkar, R.E. Delay or anticipatory synchronization in one-way coupled systems using variable delay with reset. Pramana - J Phys 77, 891–904 (2011). https://doi.org/10.1007/s12043-011-0195-z

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  • DOI: https://doi.org/10.1007/s12043-011-0195-z

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