ECOSMOG-CVG: An Efficient Code for Simulating Cubic Vector Galileon Gravity

We introduce a new code, ECOSMOG-CVG, to run N-body simulations for investigating the nonlinear growth of large-scale structure in the generalised Proca theory, in which a self-interacting massive vector field plays the role of driving the acceleration of the cosmic expansion. Our code is based on the RAMSES code, which solves the Poisson equation on adaptively refined meshes to gain high resolutions in the high-density regions. We have added a solver for the extra degrees of freedom introduced by the cubic vector Galileon. This code is designed for performing high-accuracy, high-resolution and large-volume cosmological simulations, which can be utilised to test the cubic vector Galileon gravity theory against upcoming and future deep and high-resolution galaxy surveys.