One-parameter extension of the Doi-Peliti formalism and relation with   orthogonal polynomials
  An extension of the Doi-Peliti formalism for stochastic chemical kinetics is proposed. Using the extension, path-integral expressions consistent with previous studies are obtained. In addition, the extended formalism is naturally connected to orthogonal polynomials. We show that two different orthogonal polynomials, i.e., Charlier polynomials and Hermite polynomials, can be used to express the Doi-Peliti formalism explicitly. 
Jun Ohkubo
cond-mat.stat-mech physics.chem-ph