Dm. Barnett et T. Tajima, FLUCTUATIONS AND THE MANY-BODY LYAPUNOV EXPONENT, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 54(6), 1996, pp. 6084-6092
An ab initio theoretical method is derived for calculating the maximal
Lyapunov exponent of an N-body system obeying Hamilton's equations. T
he theory is developed in detail for a dilute gas. It shows the Lyapun
ov exponent to be a function of the time integral of the correlation f
unction for fluctuations in the second derivative of the interparticle
potential (approximately a power 1/3 law). We apply the theory to a o
ne-component plasma and derive the dependence of the Lyapunov exponent
on a plasma parameter.