Postselection is one of the notions that makes quantum computing simultaneously so exciting and perplexing; the idea that for a super-complex problem riddled with variables, you solve by letting the variables take any value at random and postselect for the one combination that makes the problem true. Put another way, rather than solving all the possible combinations to the problem one at a time, you run all possible combinations simultaneously and extract the set of variables that make the problem true.
Though they work with a couple of partners out of Aaron's garage, Aaron and Abe are secretly constructing a machine called "the box," which they originally envision as a superconductor that can degrade gravity on an object, but which has some amazing unintended side effects. One of those side effects is that it operates on a feedback loop, and puts out slightly more voltage than they're putting in.
