When two quantum objects interact, all the information they carry becomes scrambled. Now, physicists have calculated a fundamental limit for how quickly this can happen.
One striking example of information scrambling happens in black holes, says at the University of Maryland. When objects fall into these super-dense bodies, some of the information they contain reemerges in the black hole’s emitted radiation – but in a highly scrambled form.
In fact, physicists have theorised that black holes are the fastest possible scramblers…