The Totally Asymmetric Simple Exclusion Process with a Shortcut of Arbitrary Length
In this work we continue the study of the totally asymmetric simple exclusion process, defined on an open network, consisting of head and tail simple chain segments with a double-chain section, inserted in-between [1,2]. We consider the case when the two branches of the double-chain section are of dierent length, thus modelling a bypass on a linear track. The model was first introduced and studied in  for a zero length of the shortcut. However, further study  reveals rather different and unexpected results. We study here the interesting case which arises when the network is in the maximum current phase. Preliminary numerical simulations show how the density profileof В the middle segment changes from high to low density depending on the length of the shortcut and also on the probability of taking the shortcut. These results may have interesting implications for planning of roadway traffic as well as for better understanding of the behaviour of some processes in biological systems [3,4].
 J. Brankov, N. Pesheva, N. Bunzarova, Totally asymmetric simple exclusion process on chains with a double chain section in the middle: Computer simul. and a simple theory, Phys. Rev. E 69, 066128 (2004).
В N. Bunzarova, N. Pesheva, and J. Brankov, Asymmetric simple exclusion process on chains with a shortcut, Phys. Rev. E 89, 032125 (2014).
В Y.-M. Yuan, R. Jiang, R. Wang, M.-B. Hu, and Q.-S. Wu, Totally asymmetric simple exclusion process with a shortcut, J. Phys. A 40,12351 (2007).
В C. T. MacDonald, J. H. Gibbs, and A. C. Pipkin, Kinetics of biopolymerization on nucleic acid templates, Biopolymers 6, 1 (1968).
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