Abstract
In this chapter we consider diffusion of hard-core interacting Brownian particles in a semi-infinite one-dimensional interval with the absorbing boundary at the origin.
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Notes
- 1.
Notice that the notation \(\mathbf {X}_{n}(t)\) has been used in the introductory Chap. 2 for noninteracting particles. Hence it seems to be more plausible to denote the position of the nth tracer and its absorption time as \(\mathbf {X}_{n:\infty }(t)\), \(\mathbf {T}_{n:\infty }\), respectively. However, we have decided not to include the symbol “\(\infty \)” into the notation. The precise meaning should be always clear from the context and we believe that no confusion may arise. From now on the position of a generic noninteracting particle and its absorption time will be denoted by unindexed random variables \(\mathbf {X}(t)\), \(\mathbf {T}\), respectively.
- 2.
Everywhere in this chapter and Chap. 4 all PDFs that have originated in the one-dimensional single-particle problem are denoted by the letter “f”. Contrary to this, PDFs that occur in the many-particle problem with interaction will be designated by the letter “p”.
- 3.
The vector notation used: \(\vec {x}_{N-k}=(x_{k+1},\ldots \,,x_{N})\), \(k=0,1,\ldots ,(N-1)\).
- 4.
- 5.
Main steps of the underlying calculation are following. We define the auxiliary function B(x, t), \(F(x,t)=1-B(x,t)\). Then we expand the term \([F(x,t)]^{n-1}\) in the tracer PDF (3.39) according to the binomial theorem into the sum of powers of B. Properties of the auxiliary function B (\(f(x,t) = - \partial B/\partial x\), \(B(0,t)=S(t)\), \(B(\infty ,t)=0\)) allows for a direct integration of each term of the emerging sum which yields Eq. (3.43).
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Ryabov, A. (2016). SFD in a Semi-Infinite System with Absorbing Boundary. In: Stochastic Dynamics and Energetics of Biomolecular Systems. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-27188-0_3
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