On dualities for SSEP and ASEP with open boundary conditions. (English) Zbl 1362.82036
Summary: Duality relations for simple exclusion processes with general open boundaries are discussed. It is shown that a combination of spin operators and bosonic operators enables us to have a unified discussion about duality relations with open boundaries. As for the symmetric simple exclusion process (SSEP), more general results than those from previous studies are obtained. It is clarified that not only the absorbing sites, but also additional sites – called copying sites – are needed for the boundaries in the dual process for the SSEP. The role of the copying sites is to conserve information about the particle states on the boundary sites. Similar discussions are applied to the asymmetric simple exclusion process (ASEP), in which the \(q\)-analogues are employed, and it is clarified that the ASEP with open boundaries has a complicated dual process on the boundaries.
MSC:
| 82C22 | Interacting particle systems in time-dependent statistical mechanics |
| 82C31 | Stochastic methods (Fokker-Planck, Langevin, etc.) applied to problems in time-dependent statistical mechanics |
Keywords:
symmetric simple exclusion process; asymmetric simple exclusion process; duality; Doi-Peliti formalismReferences:
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