MCTDH-X: The multiconfigurational time-dependent Hartree method for indistinguishable particles software

We introduce and describe the multiconfigurational time-depenent Hartree for indistinguishable particles (MCTDH-X) software. The MCTDH-X software is a set of programs and scripts to compute , analyze, and visualize solutions for the time-dependent and time-independent Schrodinger equation for many-body systems made of interacting indistinguishable particles. The MCTDH-X software represents a fairly general solver for the Schrodinger equation and is thus applicable to a wide range of problems in the fields of atomic, optical, and molecular physics, light-matter interaction, and the correlated dynamics of electrons in condensed matters, atoms or molecules. The MCTDH-X software solves a set of non-linear coupled working equations that are obtained by applying the variational principle to the Schrodinger equation using an ansatz for the wave-function that is a time-dependent expansion in a set of time-dependent, fully symmetrized or fully anti-symmetrized many-body basis states. It is this time-dependence of the basis set, that enables MCTDH-X to deal with quantum dynamics at a superior accuracy as compared to exact diagonal-ization or other approaches with a static basis, where the number of necessary basis states typically grows drastically with time. The MCTDH-X software is hosted, documented, and distributed at http://ultracold.org .