I posted this question again in a different way, but it was a mess, and people were not satisfied, so it was closed down. I hope this time it's ok. Let's say humanity could concentrate all of its resources to create a perfect vacuum (neutrinos, photons etc don't count, it only has to be devoid of any atoms). The vacuum chamber doesn't have to be that large, 1cm^3 will do. Is it possible to create this sort of vacuum and maintain it for an extended period of time with current technology, but all the resources available to humanity and not considering time and economical cost? If yes, how?