Believe Ur dimension is the only 1 oh contrare!

quantum computers themselves function in multiple realities at once! hell they just started building them only couple years ago. and there already more powerful then tradiational computers some over 70X already. Hell other one's even hundreds. thousands ,millions ,billions and trillions, quentillions.
HOw do i know i know what they are and there's near infinte number of realties all existing at the same time. We choose the 1 we are in baby!

Besides all those places you go 2 in dreamspace/astral those are all real realties to !