Abstract
We introduce and review a number of topics drawn from the theories of random processes and random systems. In particular we address the following subjects: random walks in continuous spaces and on lattices; continuum limits of random walks and stable distributions; master equations, generalized master equations and continuous-time random walks; self-avoiding walks on lattices; percolation theory; steady-state and transient transport in random lattices; and diffusion and conduction in heterogeneous continua.
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References for Part A
K. Pearson, "The problem of the random walk", Nature 72 (1905) 294. In the less abstract half of the random walk literature it has become something of a tradition to commence articles with a direct quote of all or part of this letter, or at least to reproduce it in a footnote. Physicists may be amused to note that on the same page as Pearson's letter, J.H. Jeans argues at some length that Planck's constant h cannot possibly have a non-zero value!
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S. Havlin and D. Ben-Avraham, to "Corrections to scaling in self-avoiding walks", Phys. Rev. A 27 (1983) 2759–2762 give the estimate ν=0.588±0.003 in three dimensions, using a method based on fractal dimensionality, while J.C. le Guillou and Z. Zinn-Justin, "Critical exponents from field theory", Phys. Rev. B. 21 (1980) 3976–3998 give ν=0.588 ± 0.001. Evidence is thus accumlating that in three dimensions the ‘accepted’ values of the exponents are not precisely correct.
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P.W. Kasteleyn, "A soluble self-avoiding walk problem", Physica 29 (1963) 1329–1337; see also M.N. Barber, "Asymptotic results for self-avoiding walks on a Manhattan lattice", Physica 48 (1970) 237–241.
B.K. Chakrabarti and S.S. Manna, "Critical behaviour of directed self-avoiding walks", J. Phys. A 16 (1983) L113–L116. The numerical estimate v≃0.86 for a two dimensional directed self-avoiding walk given in this paper has been shown to be inaccurate by S. Redner and I. Majid ("Critical properties of directed self-avoiding walks", J. Phys. A 16 (1983) L307–L310), who derive the exact result that v=1. Directed self-avoiding walks can be used to construct rigorous bounds on the connective constant of a lattice: see M.E. Fisher and M.F. Sykes, "Excluded volume problem and the Ising model of ferromagnetism", Phys. Rev. 114 (1959) 45–58.
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G.S. Rushbrooke, "On the thermodynamics of the critical region of the Ising problem", J. Chem. Phys. 39 (1963) 842–843.
R.B. Griffiths, "Thermodynamic inequality near the critical point for ferromagnets and fluids", Phys. Rev. Lett. 14 (1965) 623–624.
G. Toulouse, "Perspectives from the theory of phase transitions", Nuovo Cimento 23B (1974) 234–240. The existence of the upper critical dimension EC, and the result that EC=6 for percolation theory, are generally believed by physicists, but like most "known results" of percolation theory, rigorous proofs are lacking. Monte Carlo simulations of S. Kirkpatrick, "Percolation processes in higher dimensions: approach to the mean-field limit", Phys. Rev. Lett. 36 (1976) 69–72 support Toulouse's results.
A.B. Harris, T.C. Lubensky, W.K. Holcomb and C. Dasgupta, "Renormalization group approach to percolation problems", Phys. Rev. Lett. 35 (1975) 327–330 (errata, ibid., 1397).
Mean field theories of ferromagnetic models neglect fluctuations, by assuming that partial ordering of the spins produces a uniform local magnetic field. See, for example, ref. [72], pp. 34–39. Mean field calculations predict that α=α′ and γ=γ′.
R. Bass and M.J. Stephen, "Voltage correlations in a random Bethe lattice", J. Phys. C. 8 (1975) L281–L284 propose a definition of ξ(p) which gives a finite correlation length at p=pC; alternative definitions are given by A. Coniglio, "Some cluster size and percolation problems for interacting spins", Phys. Rev. B 13 (1976) 2194–2207, and J.P. Straley, "The ant in the labyrinth: diffusion in random networks near the percolation threshold", J. Phys. C 13 (1980) 2991–3002.
M.J. Stephen, "Site-cluster distributors and equation of state for the bond percolation model", Phys. Rev B 15 (1977) 5674–5680; see also R.G. Priest and T.C. Lubensky, "Critical properties of two tensor models with application to the percolation problem", Phys. Rev. B 13 (1976) 4159–4171 (errata ibid. 14 (1976) 5125).
M.P.M. den Nijs, "A relation between the temperature exponents of the eight-vertex and q-state Potts model", J. Phys. A 12 (1979) 1857–1868; see also "Extended scaling relation for the magnetic critical exponents of the q-state Potts model", Phys. Rev. B 27 (1983) 1674–1679.
B. Nienhuis, E.K. Riedel and M. Schick, "Magnetic exponents of the two dimensional q-state Potts model", J. Phys. A. 13 (1980) L189–L192.
R.B. Pearson, "Conjecture for the extended Potts model magnetic eigenvalue", Phys. Rev. B 22 (1980) 2579–2580.
R.B. Pearson, "Number theory and critical exponents", Phys. Rev. B 22 (1980) 3465–3470. With a few modest assumptions, Pearson shows that if the critical exponents α and β are rational, and therefore able to be written as the ratio m/n of two relatively prime integers m and n, the value of n can be predicted.
Applications oriented reviews include: H.L. Frisch and J.M. Hammersley, "Percolation processes and related topics", J. Soc. Indust. Appl. Math. 4 (1963) 894–918
Applications oriented reviews include: H.E. Stanley, "New directions in percolation theory including possible applications to the real world", Lecture Notes in Physics, 149 (1981) 59–83.
Applications oriented reviews include: G. Deutscher, "Experimental relevance of percolation", Lecture Notes in Physics 149 (1981) 26–40.
The article by V.K.S. Shante and S. Kirkpatrick, "An introduction to percolation theory", Adv. Phys. 20 (1971) 325–357 remains a good introduction to the subject, and addresses applications of interest in condensed matter physics. For more recent developments in this area see the following articles in Ill-Condensed Matter (ed. R. Balian, R. Maynard and G. Toulouse: Amsterdam, North-Holland, 1979): D.J. Thouless, "Percolation and localization" (pp. 1–62); S. Kirkpatrick, "Models of disordered materials" (pp. 321–403); T.C. Lubensky, "Thermal and geometrical critical phenomena in random systems" (pp. 405–475).
The structure of the connected component as p → p +c is examined by S. Kirkpatrick, "The geometry of the percolation threshold", in AIP Conference Proceedings Vol. 40, ed. J.C. Garland and D.B. Tanner, pp. 99–117 (New York, American Institute of Physics, 1978); see also Redner's first article in this volume. Illustrations from a motion picture recording the growth of connectivity as p increases are given by C. Domb, E. Stoll and T. Schneider, "Percolation clusters", Contemp. Phys. 21 (1980) 577–592.
The problem of polymer gelation, interpreted as a percolation process, is reviewed by D. Stauffer, A. Coniglio and M. Adam, "Gelation and critical phenomena", Adv. Polymer Sci. 44 (1982) 103–158; this article also contains a useful survey of variants of the basic percolation model.
The following articles are written with emphasis on fundamental mathematical problems in percolation theory, including the problem of "first passage percolation": D.J.A. Welsh, Percolation and related topics", Sci. Prog. Oxf. 64 (1977) 65–83; J.M. Hammersley and D.J.A. Welsh, "First passage percolation, subadditive processes, stochastic networks, and generalized renewal processes", in Bernoulli-Bayes-Laplace Anniversary Volume (ed. J. Neyman and L.M. le Cam), pp. 61–110 (New York, Springer-Verlag, 1965); J.M. Hammersley and D.J.A. Welsh, "Percolation theory and its ramifications", Contemp. Phys. 21 (1981) 593–605; see also the monograph by R.T. Smythe and J.C. Wierman, "First passage percolation on the square lattice", Lecture Notes in Mathematics 671 (1978).
P.H. Winterfeld, L.E. Scriven and H.T. Davis, "Percolation and conductivity of random two-dimensional composites", J. Phys. C. 14 (1981) 2361–2376.
S.W. Haan and R. Zwanzig, "Series expansions in a continuum percolation problem", J. Phys. A. 10 (1977) 1547–1555.
E.T. Gawlinski and H.E. Stanley, "Continuum percolation in two dimensions: Monte Carlo tests of scaling and universality for non-interacting discs", J. Phys. A 14 (1981) L291–L299.
R. Zallen, "Stochastic qeometry", in Fluctuation phenomena (ed. E.W. Montroll and J.L. Lebowitz) pp. 177–228 (Amsterdam, North-Holland, 1979). See also a book by Y. Waseda, The structure of non-cyrstalline materials (New York, McGraw-Hill, 1980).
S.A. Roach, The theory of random clumping (London, Methuen, 1968).
S. Kirkpatrick, "Percolation and conduction", Rev. Mod. Phys. 45 (1973) 574–588.
J.P. Clerc, G. Giraud, J. Roussenq, R. Blanc, J.P. Carton, E. Guyon, H. Ottavi and D. Stauffer, "La percolation: modèles, simulations analogiques et numériques", Annales de Physique 8 (1983) 3–105.
In principle one should prove that the critical value of p defined via the conductivity coincides with the topologically defined bond percolation threshold of section 6. Kesten [116] has given a proof of this for the square lattice.
B. Derrida and J. Vannimenus, "A transfer matrix approach to random resistor networks", J. Phys. A. 15 (1982) L557–L564.
P.G. de Gennes, "On a relation between percolation theory and the elasticity of gels", J. Physique Lett. 37 (1976) L1–L2.
A.B. Harris and R. Fisch, "Critical behavior of random resistor networks", Phys. Rev. Lett. 38 (1977) 796–799.
R.B. Stinchcombe, "The branching model for percolation theory and electrical conductivity", J. Phys. C. 6 (1973) L1–L5, and "Conductivity and spin-wave stiffness in disordered systems — an exactly soluble model", J. Phys. C. 7 (1974) 179–203; see also J. Heinrichs and N. Kumar, "Simple exact treatment of conductance in a random Bethe lattice", J. Phys. C 8 (1975) L510–L516.
J.P. Straley, "Random resistor tree in an applied field", J. Phys. C 10 (1977) 3009–3013.
S. Alexander and R. Orbach, "Density of states on fractals: ‘fractons'", J. Physique Lett. 43 (1982) L625–L631; see especially the note added in proof.
See, e.g., D.A.G. Bruggeman, "Berechnung verschiedener physikalischer Konstanten von heterogenen Substanzen. I. Dielektrizitatskonstanten und Leitfahigkeiten der Mischkorper aus isotropen Substanzen", Ann. Phys. (Leipzig) 24 (1935) 636–697, and R. Landauer, "The electrical resistance of a binary mixture", J. Appl. Phys. 23 (1952) 779–784.
A substantial review of the coherent potential approximation has been given by F. Yonezawa and K. Morigaki, "Coherent potential approximation — Basic concepts and applications", Prog. Theor. Phys. Suppl. 53 (1973) 1–75. See also the short expository article by J.A. Krumhansl, "It's a random world", in Amorphous Magnetism (ed. H.O. Hooper and A.M. de Graaf) pp. 15–25 (New York, Plenum, 1973), and for more recent references, F. Yonezawa, "Transport properties of liquid non-simple metals", J. Physique 41 suppl. C8 (1980) 447–457. For a proof of the equivalence of the coherent potential approximation and the effective medium approximation see M. Hori and F. Yonezawa, "Statistical theory of effective electrical, thermal, and magnetic properties of random heterogeneous materials. IV. Effective medium theory and cumulant expansion method", J. Math. Phys. 16 (1975) 352–364. These authors propose a different approximation technique, employing cumulants, which predicts that pc=1−exp(−2/z) for a lattice of coordination number z. For large z this reduces to the effective medium result (7.12). Although for two-dimensional lattices, their prediction is less accurate then (7.12), the situation is reversed in three dimensions.
S. Kirkpatrick, "Classical transport in disordered media: scaling and effective-medium theories", Phys. Rev. Lett. 27 (1971) 1722–1725.
M. Sahimi, B.D. Hughes, L.E. Scriven and H.T. Davis, "Real-space renormalization and effective medium approximation to the percolation conduction problem", Phys. Rev. B. 28 (1983), 307–311. For other improvements of the basic effective medium approximation based on finite clusters of bonds see, for example: L. Turban, "On the effective-medium approximation for bond-percolation conductivity", J. Phys. C 11 (1978) 449–459, T. Nagatani, "A two-bond theory of conductivity in bond disordered resistor networks", J. Phys. C 14 (1981) 3383–3391 and references cited therein. An ad hoc, but effective alternative approach has been given by M. Nakamura, "A method to improve the effective medium theory towards percolation problem", J. Phys. C 15 (1982) L749–L752.
J.W. Essam, C.M. Place and E.H. Sondheimer, "Self consistent calculation of the conductivity in a disordered branching network", J. Phys. C 8 (1974) L258–L260.
P.M. Kogut and J.P. Straley, "Distribution-induced non-universality of the percolation conductivity exponents", J. Phys. C 12 (1979) 2151–2159; see also A. Ben-Mizrahi and D.J. Bergman, "Non-universal critical behaviour of random resistor networks with a singular distribution of conductances", J. Phys. C. 14 (1981) 909–922, and J.P. Straley, "Non-universal threshold behaviour of random resistor networks with anomalous distributions of conductances", J. Phys. C. 15 (1982) 2343–2345, where renormalization group arguments are used.
J. Bernasconi and H.J. Weisman, "Effective-medium theories for site-disordered resistance networks", Phys. Rev. B 13 (1976) 1131–1139; T. Joy and W. Strieder, "Effective medium theory of site percolation in a random simple triangular conductance network", J. Phys. C 11 (1978) L867–L870 (errata ibid. 12 (1979) L53).
J.P. Straley, "Critical phenomena in resistor networks", J. Phys. C. 9 (1976) 783–795; see Ref. [154] for a reinterpretation of some of these results with the now preferred definition of σ for the Bethe lattice. Also see Ref. 151 and R. Fisch and A.B. Harris, "Critical behavior of random resistor networks near the percolation threshold", Phys. Rev. B. 18 (1978) 416–420, where the formal relation of Kasteleyn and Fortuin [123] between the q-state Potts model in the limit q=0 and the resistance between sites of a homogeneous lattice is exploited.
J.P. Straley, "Critical exponents for the conductivity of random resistor networks", Phys. Rev. B. 15 (1977) 5733–5737.
J.P. Straley, "Threshold behaviour of random resistor networks: a synthesis of theoretical approaches", J. Phys. C. 15 (1982) 2333–2341.
See, for example, J. Koplik, "Creeping flow in two-dimensional networks", J. Fluid Mech. 119 (1982) 219–247. Koplik's analysis (see also his paper, "On the effective medium theory of random linear networks", J. Phys. C 14 (1981) 4821–4837) shows that for nonpercolative distributions, i.e. when f(g) has no delta function at g=0, the effective medium approximation is remarkably accurate. Indeed for a special class of such distributions, the effective medium approximation is exact for the square lattice: see J. Marchant and R. Gabillard, "Sue le calcul d'un réseau résistif aléatoire, C.R. Acad. Sci. Paris B281 (1975) 261–264.
G.R. Jerauld, J.C. Hatfield, L.E. Scriven and H.T. Davis, "Percolation and conduction on Voronoi and triangular networks: a case study in topological disorder", to appear in J. Phys. C.
G.C. Koerber, Properties of Solids (Englewood Cliffs, N.J., Prentice-Hall, 1962) pp. 69–71. See also P.G. Sherman, Diffusion in solids (New York, McGraw-Hill, 1963) and Y. Adda and J. Philibert, La diffusion dans les solides, 2 volumes (Paris, Presses Universitaires de France, 1966).
Since the electrical transport properties of semiconductors are of immense technical importance (e.g. in the Xerox process) many experiments have been made. See, for example, references cited by H. Scher and M. Lax, "Stochastic transport in a disordered solid. II. Impurity conduction", Phys. Rev. B 7 (1973) 4502–4519.
Dispersion in disordered porous media is reviewed in J.J. Fried and M.A. Combernous, "Dispersion in porous media", Advances in Hydroscience 7 (1971) 169–282; for more recent references see e.g. M. Sahimi, L.E. Scriven and H.T. Davis, "Dispersion in disordered porous media", Chem. Eng. Comm., in press. The simpler case of dispersion in spatially periodic porous media has been analysed exhaustively by H. Brenner, "Dispersion resulting from flow through spatially periodic porous media", Phil. Trans. R. Soc. Lond. A 297 (1980) 81–133, and H. Brenner and P.M. Adler, "Dispersion resulting from flow through spatially periodic porous media. II. Surface and intraparticle transport", ibid. 307 (1982) 169–200.
M.V. Kozlov, "Random walk in a one-dimensional random medium", Theory Prob. Appl. 18 (1973) 387–388.
F. Solomon, "Random walks in a random environment", Ann. Prob. 3 (1975) 1–31.
D.E. Temkin, "One-dimensional random walks in a two-component chain", Soviet Math. Dokl. 13 (1972) 1172–1176.
Ya. G. Sinai, “The limiting behavior of a one-dimensional random walk in a random environment“, Theory Prob. Appl. 27 (1982) 256–268. Stated precisely Sinai's key result is as follows. Assume that <log σ>=0. Let ɛ>0 and δ>0 be given. For all sufficiently large n there exist a set Cn in the space of all realizations ω and a point m(n)=m(n;ω) for each ω ɛ Cn such that (i) the probability that a given realization belongs to Cn exceeds 1-ɛ; and (ii) with Pr denoting probability measure over all walks in a given environment ω, if ω ɛ Cn, then Pr(|Xn/log2n-m(n)| ⩽ δ) → 1 as n → ∞. The convergence is uniform in ω ɛ Cn, and as n → ∞ the probability distributions for m(n) converge weakly to some limit distribution.
H. Kesten, M.V. Kozlov and F. Spitzer, "A limit law for random walk in a random environment", Compositio Math. 30 (1975) 145–168.
A distribution is called ‘arithmetic’ (see Ref. 20, p. 138) if it is concentrated on the set of points 0,±λ,±2λ,... for some positive λ called the 'span'. In the example (8.7), log σ has probability density function ψ(η)=(1−p) δ (η−log{a/[1−a]})+pδ(η+log{a/[1−a]}), i.e. an arithmetic distribution of span log{a/[1−a]}, and so is not covered by the results of Kesten et al.
B. Derrida and Y. Pomeau, "Classical diffusion in a random chain", Phys. Rev. Lett. 48 (1982) 627–630.
B. Derrida, "Velocity and diffusion coefficient of a periodic one-dimensional hopping model", J. Stat. Phys. 31 (1983) 433–450.
S.A. Kalikow, "Generalized random walk in a random environment", Ann. Prob. 9 (1981) 753–768.
V.V. Anshelevich, K.M. Khanin and Ya. G. Sinai, "Symmetric random walks in random environments", Comm. Math. Phys. 85 (1982) 449–470. The analysis of this paper requires symmetry in local transition probabilities, but not isotropy. All of the results are established for anisotropic systems, and transitions are not restricted to nearest-neighbour sites.
P.G. de Gennes, "La percolation: un concept unificateur", La Recherche 7 (1976) 919–927.
C.D. Mitescu and J. Roussenq, "Une fourmi dans un labyrinthe: diffusion dans un système de percolation", C.R. Acad. Sci. Paris 283A (1976) 999–1001.
C.D. Mitescu, H. Ottavi and J. Rousseng, "Diffusion on percolation lattices: the layrinthine ant", in AIP Conference Proceedings Vol. 40 (ed. J. Garland and D.B. Tanner) pp. 377–381 (New York, American Institute of Physics, 1978).
J.P. Straley, "The any in the labyrinth: diffusion in random metworks near the percolation threshold", J. Phys. C 13 (1980) 2991–3002.
Y. Gefen, A. Aharony and S. Alexander, "Anomalous diffusion on percolating clusters", Phys. Rev. Lett. 50 (1983) 77–80.
D. Ben-Avraham and S. Havlin, "Diffusion on percolation clusters at criticality" J. Phys. A 15 (1982) L691–L697, and M. Sahimi and G.R. Jerauld, "Random walks on percolation clusters at the percolation threshold", submitted to J. Phys. C.
Alternative models with continuous time-dependence are easily defined but not considered here. See, for example, G. Ritter, "A continuous-time analogue of random walk in a random environment", J. Appl. Prob. 17 (1980) 259–264, and B.D. Hughes, M. Sahimi, L.E. Scriven and H.T. Davis, "Transport and conduction in random systems", to appear in Int. J. Engng. Sci.
S. Alexander, J. Bernasconi, W.R. Schneider and R. Orbach, "Excitation dynamics in random one-dimensional systems", Rev. Mod. Phys. 53 (1981) 175–198. (These authors also consider the randomized rate equation cldPl/dt=W{Pl+1+Pl−1-2Pl} with W fixed, but {Cl} a set of independently and identically distributed random variables.)
J. Bernasconi, S. Alexander and R. Orbach, "Classical diffusion in a one-dimensional disordered lattice", Phys. Rev. Lett 41 (1978) 185–187
S. Alexander, J. Bernasconi and R. Orbach, "Spectral diffusion in a one-dimensional percolation model", Phys. Rev. B 17 (1978) 4311–4314
S. Alexander, J. Bernasconi and R. Orbach, "Low energy density of states for disordered chains", J. Physique 39 Suppl C6 (1978) 706–707
S. Alexander, J. Bernasconi, W.R. Schneider and R. Orbach, "Excitation dynamics in random one-dimensional systems", in Physics in One Dimension, ed. J. Bernasconi and T. Schneider, pp. 277–288 (Berlin, Springer-Verlag, 1981)
J. Bernasconi and H.U. Beyeler, "Some comments on hopping in random one-dimensional systems", Phys. Rev. B 21 (1980) 3745–3747
J. Bernasconi, H.U. Beyeler, S. Strässler and S. Alexander, "Anomalous frequency-dependent conductivity in disordered one-dimensional systems", Phys. Rev. Lett. 42 (1979) 819–822
J. Bernasconi, W.R. Schneider and W. Wyss, "Diffusion and hopping conductivity in disordered one-dimensional lattice systems", Z. Phys. B 37 (1980) 175–184.
J. Bernasconi and W.R. Schneider, "Classical hopping conduction in random one-dimensional systems: non universal limit theorems and quasilocalization effects", Phys. Rev. Lett. 47 (1981) 1643–1647.
W.R. Schneider and J. Bernasconi, "Diffusion in one-dimensional lattice systems with random transfer rates", Lecture Notes in Physics 153 (1982) 389–393.
W.R. Schneider, "Hopping transport in disordered one-dimensional lattice systems: random walk in a random medium", Lecture Notes in Physics 173 (1982) 289–303.
J. Bernasconi and W.R. Schneider, "Diffusion in random one-dimensional systems", J. Stat. Phys. 30 (1983) 355–362.
V.V. Anshelevich and A.V. Vologodskii, "Laplace operator and random walk on a one-dimensional nonhomogeneous lattice", J. Stat. Phys. 25 (1981) 419–430. These authors consider the master equation \((\partial /\partial t)P_\ell (t){\text{ }} = {\text{ }}[1 - \delta _{\ell ,1} ]a_{\ell - 1} {\text{ }}P_{\ell - 1} (t){\text{ }} - {\text{ }}(a_{\ell - 1} + a_\ell )P_\ell (t){\text{ }} + {\text{ }}[1 - \delta _{\ell ,{\rm N} - 1} ]a_\ell P_{\ell - 1} (t)\) which describes motion on a finite linear chain, with the zeroth and Nth sites absorbing boundaries. The lth site is assigned the coordinate l/N. When the limit N → ∞ is taken in an appropriate manner, the solution of the master equation is shown to approach the solution of the diffusion equation with absorbing boundaries, \((\partial /\partial t){\text{ }}p(x,t) = a(\partial ^2 /\partial x^2 )p(x,t){\text{ }},{\text{ }}p(0,t) = p(l,t) = 1\), so long as a \(a = \mathop {\lim }\limits_{N \to \infty } N(\sum\nolimits_{\ell = 0}^{N - 1} {a_\ell ^{ - 1} } )\) exists and is non-zero. For independent, randomly distributed coefficients al, this implies that if a −1l has finite mean <a −1l >, then the effective diffusion coefficient is a=<a −1l >−1 with probability 1.
V.V. Bryksin, "Frequency dependence of the hopping conductivity of a one-dimensional system calculated by the effective-medium method", Sov. Phys. Solid St. 22 (1980) 1194–1199.
T. Odagaki and M. Lax, "Coherent-medium approximation in the stochastic transport theory of random media", Phys. Rev. B 24 (1981) 5284–5294. See also M. Lax and T. Odagaki, "Coherent medium approach to hopping conduction", Lecture Notes in Physics 154 (1982) 148–176.
S. Summerfield, "Effective medium theory of A.C. hopping conductivity for random bond lattice models, Solid St. Comm. 39 (1981) 401–402.
I. Webman, "Effective medium approximation for diffusion on a random lattice", Phys. Rev. Lett. 47 (1981) 1496–1499. See also I. Webman, "Effective medium approximation for diffusion or random networks", Lecture Notes in Physics 154 (1982) 297–303.
J.W. Haus, K.W. Kehr and K. Kitahara, "Long-time tail effects on particle diffusion in a disordered system", Phys. Rev. B 25 (1982) 4918–4921.
J.W. Haus, K.W. Kehr and K. Kitahara, "Transport in a disordered medium: analysis and Monte-Carlo simulation", Z. Phys. B 50 (1983) 161–169.
B. Movaghar, M. Grunewald, B. Pohlmann, D. Wurtz and W. Schirmacher, "Theory of hopping and multiple-trapping transport in disordered systems", J. Stat. Phys. 30 (1983) 315–334, and references therein to earlier work of these authors.
I. Webman and J. Klafter, "Diffusion in one-dimensional disordered systems: an effective-medium approximation", Phys. Rev. B 26 (1982) 5950–5952.
M. Sahimi, B.D. Hughes, L.E. Scriven and H.T. Davis, "Stochastic transport in disordered systems", J. Chem. Phys. 78 (1983) 6849–6864.
For the Kirkpatrick random resister problem, the Green function formalism has been developed by J. A. Blackman, "A theory of conductivity in disordered resistor networks", J. Phys. C 9 (1976) 2049–2071, and G. Ahmed and J. A. Blackman, "On theories of transport in disordered media" ibid. 12 (1976) 837–853. Its extension to the present problem may be found in Ref. 201.
M.J. Stephen and R. Kariotis, "Diffusion in a one-dimensional disordered system", Phys. Rev. B 26 (1982) 1917–2925.
J. Machta, Generalized diffusion coefficient in one-dimensional random walks with static disorder", Phys. Rev. B 26 (1982) 2917–2925; "Renormalization group approach to random walks on disordered lattices", J. Stat. Phys. 30 (1983) 305–314.
A. Igarashi, "Hopping diffusion in a one-dimensional random system", Prog. Thear. Phys. 69 (1983) 1031–1034.
R. Zwanzig, "Non-Markoffian diffusion in a one-dimensional disordered lattice", J. Stat. Phys. 28 (1982) 127–133.
M.J. Stephen, "Diffusion on a directed percolating network", J. Phys. C 14 (1981) L1077–L1080.
J. Bernasconi and W.R. Schneider, "Diffusion on a one-dimensional lattice with random asymmetric transition rates", J. Phys. A 15 (1983) L729–L734.
M. Barma and D. Dhar, "Directed diffusion in a percolation network", J. Phys. C 16 (1983) 1451–1458.
See also B.D. Hughes, M. Sahimi, L.E. Scriven and H.T. Davis, "Transport and conduction in random systems", Int. J. Eng. Sci, in press. Such models are lattice versions of a classic colloid problem of M. Smoluchowski, ref 11; important recent papers with a physical chemistry orientation include B.U. Felderhof and J.M. Deutch, "Concentration dependence of the rate of diffusion-controlled reactions, J. Chem. Phys. 64 (1976) 4551–4558, P. Grassberger and I. Procaccia, "The long-time properties of diffusion in a medium with static traps", ibid. 77 (1982) 6281–6284, M. Muthukumar, "Concentration dependence of diffusion controlled processes among static traps", ibid. 76 (1982) 2667–2671, S. Prager and H. L. Frisch, "Diffusion-controlled reactions on a two-dimensional lattice", ibid. 72 (1980) 2941-, and R.F. Keyser and J.B. Hubbard, "Diffusion in a medium with a random distribution of static traps", Phys. Rev. Lett. 51 (1983) 79–82.
B. Movaghar, B. Pohlmann and W. Schirmacher, "Random walk in disordered hopping systems", Solid State Comm. 34 (1980) 451–454.
J. Klafter and R. Silbey, “Derivation of the continuous-time random walk equation”, Phys. Rev. Lett. 44 (1980) 55-.
We apologize to Charles Darwin for borrowing the structure, and the tone, of his concluding sentence in The Origin of Species, as our closing remark.
References
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For a review see G.K. Batchelor “Transport Properties of Two-Phase Materials of Random Structure”, Ann. Rev. Fluid Mech. 6 (1974) 227–255.
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For a review see M. Beran, Statistical Continuum Theories, (New York, Interscience, 1968).
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S. Prager, “Diffusion and Viscous Flow in Concentrated Suspensions”, Physica 29 (1963) 129.
Excellent discussions of reciprocal variation principles is to be found in J.L. Synge, The Hypercircle in Mathematical Physics, (Cambridge University Press, 1957) and in A.M. Arthurs, Complementary Variational Principles, (Oxford, Clarendon Press, London, 1970).
M.J. Beran, “Use of the Variational Approach to Get Bounds for the Effective Permittivity in Random Media”, Nuovo Cimento 38 (1965) 771–782.
W.F. Brown, “Dielectric Constants, Permeabilities, and Conductivities of Random Media”, Trans. Soc. Rheology 9 part 1 (1965) 357–380; an interesting extension to non-symmetric media has been given by M.N. Miller, “Bounds for effective electrical, thermal, and magnetic properties of heterogeneous materials”, J. Math. Phys. 10 (1969) 1988–2004.
H.L. Frisch, “Statistics of Random Media”, Trans. Soc. Rheology 9, part 1 (1965) 293–312
H.L. Weissberg, “Effective Diffusion Coefficients in Porous Media”, J. Appl. Phys. 34 (1963) 2636–2639.
H.L. Weissberg and S. Prager, “Viscosity of Concentrated Suspension”, Trans. Soc. Rheology 9, part 1 (1965) 321–338 (discusses the viscosity analog of the diffusion problem treated here).
A.L. DeVera and W. Strieder, “Upper and Lower Bounds on the Effective Thermal Conductivities of a Random, Two-Phase Material”, J. Phys. Chem. 81 (1977) 1783–1790.
S. Prager, “Improved Variational Bounds on Some Bulk Properties of a Two-Phase Random Medium”, J. Chem. Phys. 50 (1969) 4305–4312.
D.J. Bergman, “Calculation of Bounds for Some Average Bulk Properties of Composite Materials”, Phys. Rev. B 14 (1976) 4304–4312.
R.G. Gordon, “Error Bounds in Equilibrium Statistical Mechanics”, J. Math. Phys. 9 (1968) 655–663.
G.A. Baker, Jr. Essentials of Pade Approximants, (New York, Academic Press, 1975).
D.J. Bergman, “Analytical Properties of the Complex Effective Dielectric Constant of a Composite Medium with Applications to the Derivation of Rigorous Bounds and to Percolation Problems”, in Electrical Transport and Optical Properties of Inhomogeneous Media, J.C. Garland and D.B. Tanner, eds., AIP Conference Proceedings No. 40 (New York, American Institute of Physics, 1978), pp. 46–62.
G. Woodbury and S. Prager, “Brownian Motion in Many-Particle Systems”, J. Chem. Phys. 38 (1963) 1446, and J. Am. Chem. Soc. 86, (1964) 3417.
P. Debye and W. Hueckel, “Zur Theorie der Elektrolye II. Das Grenzgesetz fuer die Elektrolytische Leiffaehigkeit”, Physik. Z. 24 (1923) 185–206.
L. Onsager, “Zur Theorie der Elektrolyte”, Physik Z. 27 (1926) 388.
S. Prager, “Viscous Flow Through Porous Media”, Phys. Fluids 4 (1961) 1477–1482.
H.L. Weissberg and S. Prager, “Viscous Flow Through Porous Media III. Upper Bounds on the Permeability for a Simple Random Geometry”, Phys. Fluids 13 (1970) 2958–2965.
Z. Hashin and S. Shtrikman, “A variational approach to the theory of the elastic behaviour of multiphase materials”, J. Mech. Phys. Solids (1963) 127–140.
Z. Hashin, “Theory of mechanical behavior of heterogeneous media”, Appl. Mech. Rev. 17 (1964) 1–9.
R.A. Reck and S. Prager, “Diffusion-Controlled Quenching at Higher Quenches Concentrations”, J. Chem. Phys. 42 (1965) 3027–3032.
W. Strieder and S. Prager, “Knudsen Flow Through a Porous Medium”, Physics of Fluids 11 (1968) 2544–2548, W. Strieder and C.Y. Shiau, “Surface Mobility in Transport Across a Porous Medium with Knudsen Diffusion in the Pores”, J. Colloid Interface Sci. 51 (1975) 152–161.
F.G. Ho and W. Strieder, “A Variational Calculation of Effective Surface Diffusion Coefficient and Tortuosity”, Chem. Eng. Sci. 36 (1982) 253–258.
J. Rotne and S. Prager, “Variational Treatment of Hydrodynamic Interaction in Polymers”, J. Chem. Phys. 50 (1969) 4831–4837.
S. Prager, “Variational Bounds on the Intrinsic Viscosity”, J. Phys. Chem. 75 (1971) 72–78.
M. Fixman, “Variational Bounds for Polymer Transport Coefficients”, J. Chem. Phys. 78 (1983) 1588–1593.
M. Fixman, “Effect of Fluctuating Hydrodynamic Interaction”, J. Chem. Phys. 78 (1983) 1588–1593.
G.H. Malone, T.F. Hutchinson and S. Prager, “Molecular Models for Permeation Through Thin Membranes”, J. Fluid Mech. 65 (1974) 753–767. See also the article by Malone, Suh and Prager in this volume.
K. Schulgasser and Z. Hashin, “Bounds for Effective Permittivities of Lossy Dielectric Composites”, J. Appl. Phys. 47 (1976) 424–427.
D.J. Bergman, “Exactly Solvable Microscopic Geometries and Rigorous Bounds for the Complex Dielectric Constnat of a Two-Component Composite Material”, Phys. Rev. Letters 44 1285–1287 (1980); see also ref. 20.
W. Strieder and R. Aris, Variational Methods Applied to Problems of Diffusion and Reaction (Berlin, Springer Verlag, 1973).
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Hughes, B.D., Prager, S. (1983). Random processes and random systems: An introduction. In: Hughes, B.D., Ninham, B.W. (eds) The Mathematics and Physics of Disordered Media: Percolation, Random Walk, Modeling, and Simulation. Lecture Notes in Mathematics, vol 1035. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0073255
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DOI: https://doi.org/10.1007/BFb0073255
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