Abstract
In this lecture I should like to report on the work I have done in collaboration with Barry McCoy and Tai Tsun Wu (and on certain aspects with Eytan Barouch)on the correlation functions of the two-dimensional Ising model. In particular, I wish to demonstrate how a particular solution of the two-dimensional hyperbolic sine-Gordon equation (also known as the two-dimensional nonlinear Debye-Hückel equation),
plays a fundamental role in the scaled two-point function in both the one-phase and two-phase regions. Before I discuss these results, I would like first to review the definition of the 2-d. Ising model1)-4)and related quantities (Section 2); and then briefly recall the scaling theory hypothesis5)-7)for correlation functions (Section 3).
Lectures given at NATO Advanced Study Institute on Nonlinear Equations in Physics and Mathematics, Istanbul, August 1977.
Supported in part by National Science Foundation Grants Nos. PHY-76-15328 and PMR 73-07565 A01.
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References and Footnotes
E. Ising, Z. Phys. 31 253 (1925).
L. Onsager, Phys. Rev. 65, 117 (1944).
C. N. Yang, Phys. Rev. 85, 808 (1952).
See also, B. M. McCoy and T. T. Wu, The Two-Dimensional Ising Model, Harvard University, Cambridge, Massachusetts, 1973.
L.P. Kadanoff, Physics (N.Y.) 2, 263 (1966).
M.E. Fisher, Rep. Prog. Phys. 30, 615 (1967).
L.P. Kadanoff, W. Gotze, D. Hamblen, R. Hecht, E.A.S. Lewis, V.V. Palciauskas, M. Rayl, J. Swift, D. Aspens, and J. Kane, Rev. Mod. Phys. 39, 395 (1967).
L. Onsager, discussion, Nuovo Cimento _6, Suppl., 261 (1949).
C.H. Chang, Phys. Rev. 88, 1422 (1952).
C.A. Tracy and B.M. McCoy, Phys. Rev. Bl2, 368 (1975).
E. Barouch, B.M. McCoy, and T.T. Wu, Phys. Rev. Letters 3.1/ 1409 (1973); C.A. Tracy and B.M. McCoy, Phys. Rev. Letters 31, 1500 (1973).
T.T. Wu, B.M. McCoy, C.A. Tracy, and E. Barouch, Phys. Rev. B13, 316 (1976).
B.M. McCoy, C.A. Tracy, and T.T. Wu in Statistical Mechanics and Statistical Methods in Theory and Application, U. Landman (ed.), Plenum Press, New York, 1977.
B.M. McCoy, C.A. Tracy, and T.T. Wu, J. Math. Phys. 18, 1058 (1977).
The closely related scaling functions in the one-dimensional XY-Model can be found in H.G. Vaidya and C.A. Tracy, Stony Brook preprint ITP-SB-77-48.
H. Vaidya, Phys. Lett. 57A, 1 (1976).
The numbers G±(2)(0) when multiplied by a lattice dependent number are equal to the susceptibility coefficients C0± where x(T)~ Cq±|1-T/Tc|-7/4. For the square lattice with symmetric interactions this constant is 23/8[2ln(l+√2)]-7/4. For the triangular lattice this lattice dependent constant can be found in Reference 16.
B.M. McCoy, C.A. Tracy and T.T. Wu, unpublished notes.
The direct numerical evaluation of G±(2) (0) is done using the Painlevé transcendent introduced below.
P. Painlevé, Acta Math. 25., 1 (1902).
B. Gambier, Acta Math. 33, 1 (1910).
E.L. Ince, Ordinary Differential Equations, Dover, New York, 1945, Chapter 14.
R.J. Baxter, Phys. Rev. Letters 26, 832 (1971) and Annals of Phys. (New York) 70, 193 (1972).
M.J. Ablowitz and H. Segur, Stud. App. Math. 57 13 (1977).
B.M. McCoy, C.A. Tracy, and T.T. Wu, Phys. Lett. 61A, 283 (1977).
M.J. Ablowitz and H. Segur, Phys. Rev. Letters 38, 1103 (1977).
B.M. McCoy, C.A. Tracy, and T.T. Wu, Phys. Rev. Letters 38, 793 (1977).
M. Sato, T. Miwa, and M. Jimbo, Proc. Tapan Acad. 53A, 6 (1977).
D.B. Abraham, Phys. Lett. 61A, 271 (1977).
Note Added in Proof
For some new results, see B.M. McCoy and T.T. Wu, Phys. Lett. 72B, 219 (1977); R.Z. Bariev, 64A, 169 (1977); D. Wilkinson, to appear in Phys. Rev. D; and R. Haberman, Stud. Appl. Math. 57, 247 (1977).
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© 1978 D. Reidel Publishing Company, Dordrecht, Holland
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Tracy, C.A. (1978). Painlevé Transcendents and Scaling Functions of the Two-Dimensional Ising Model. In: Barut, A.O. (eds) Nonlinear Equations in Physics and Mathematics. NATO Advanced Study Institutes Series, vol 40. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9891-9_10
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