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Teoreticheskaya i Matematicheskaya Fizika, 1988, Volume 77, Number 3, Pages 426–439
(Mi tmf6115)
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This article is cited in 18 scientific papers (total in 18 papers)
Autocorrelation function of a Heisenberg paramagnet in the approximation of a self-consistent fluctuating field
V. E. Zobov
Abstract:
A nonlinear integrodifferential equation is derived for the autocorrelation function of the Heisenberg paramagnet at high temperatures in the limit of an infinite-dimensional lattice. The solution of this equation on the plane of the complex time variable is investigated. A majorant and a minorant for the autocorrelation function on the imaginary axis are found, together with the nearest singular points. It is shown that at high frequencies the spectral density decreases exponentially. The damping constant and the pre-exponential factor are determined by the method of moments. The moments to tenth order are calculated.
Received: 24.04.1987
Citation:
V. E. Zobov, “Autocorrelation function of a Heisenberg paramagnet in the approximation of a self-consistent fluctuating field”, TMF, 77:3 (1988), 426–439; Theoret. and Math. Phys., 77:3 (1988), 1299–1309
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https://www.mathnet.ru/eng/tmf6115 https://www.mathnet.ru/eng/tmf/v77/i3/p426
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Abstract page: | 360 | Full-text PDF : | 106 | References: | 43 | First page: | 1 |
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