Looking for that movie about a duplicate earth

Hey guys. I’m not sure if this is the subreddit for this question but I have been looking for that movie about a duplicate earth or something. I remember that they use the matter from that earth and convert it to energy. I also remember a box/cube. Other than that, I don’t remember much. Does anyone know about it? I have been searching for it but I’ve had no luck. Thank you 😊