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Spurious phase in a model for traffic on a bridge

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David W Erickson, Gunnar Pruessner, B Schmittmann and R K P Zia

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LETTER TO THE EDITOR

We present high-precision Monte Carlo data for the phase diagram of a two-species driven diffusive system, reminiscent of traffic across a narrow bridge. Earlier studies reported two phases with broken symmetry; the existence of one of these has been the subject of some debate. We show that the disputed phase disappears for sufficiently large systems and/or sufficiently low bulk mobility.


PACS

05.10.Ln Monte Carlo methods

05.60.-k Transport processes

05.70.Fh Phase transitions: general studies

05.70.Ln Nonequilibrium and irreversible thermodynamics

64.60.Cn Order–disorder transformations

MSC

82C35 Irreversible thermodynamics, including Onsager-Machlup theory

82C22 Interacting particle systems (See also 60K35)

82C80 Numerical methods (Monte Carlo, series resummation, etc.)

82C26 Dynamic and nonequilibrium phase transitions (general)

82C70 Transport processes

Subjects

Computational physics

Condensed matter: structural, mechanical & thermal

Statistical physics and nonlinear systems

Dates

Issue 41 (14 October 2005)

Received 16 August 2005

Published 28 September 2005



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