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Far-from-equilibrium transport with constrained resources

D A Adams1,2, B Schmittmann2 and R K P Zia2

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The totally asymmetric simple exclusion process (TASEP) is a well studied example of far-from-equilibrium dynamics. Here, we consider a TASEP with open boundaries but impose a global constraint on the total number of particles. In other words, the boundary reservoirs and the system must share a finite supply of particles. Using simulations and analytic arguments, we obtain the average particle density and current of the system, as a function of the boundary rates and the total number of particles. Our findings are relevant to biological transport problems if the availability of molecular motors becomes a rate-limiting factor.


Keywords

driven diffusive systems (theory)

traffic models

molecular motors (theory)

stationary states

 

E-print Number: 0804.2717

Cited: by |

Refers: to

PACS

87.14.E- Proteins

87.15.A- Theory, modeling, and computer simulation

MSC

92B15 General biostatistics (See also 62P10)

82C70 Transport processes

92D20 Protein sequences, DNA sequences

92C40 Biochemistry, molecular biology

Subjects

Biological physics

Dates

Issue 06 (June 2008)

Received 17 April 2008, accepted for publication 16 May 2008

Published 19 June 2008



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