Date of Original Version
The results obtained from applications of the recursion method to quantum many‐body dynamics can be greatly improved if an appropriate termination function is employed in the continued‐fraction representation of the corresponding relaxation function. We present a general recipe for the construction and use of such termination functions along with two applications in spin dynamics. The method can be adapted to any other problem in quantum many‐body dynamics.
V. S. Viswanath and Gerhard Müller. Recursion method in quantum spin dynamics: the art of terminating a continued fraction. J. Appl. Phys. 67 (1990), 5486-5488.
Available at: http://dx.doi.org/10.1063/1.345859