CONAN-The cruncher of local exchange coefficients for strongly interacting confined systems in one dimension

Solution method: We wish to compute the exchange coefficients for a given system, but to do this we need to express them in a way that is more well-suited for a numerical implementation, i.e. in a way that does not involve an (N−1)-dimensional integral. In the submitted manuscript, we derive such an expression for the exchange coefficients. Our program, CONAN, is the numerical implementation of this formula for the exchange coefficients. Thus, CONAN takes as physical inputs the system size N and a smooth potential V(x), and returns the corresponding N−1 exchange coefficients appearing in the spin chain Hamiltonian.