4 ms·
All known physical processes only transform information, it's never actually lost (although it may get "transformed" in a way that it's irretrievably scrambled)
by Udo 11y ago
All known physical processes only transform information, it's never actually lost (although it may get "transformed" in a way that it's irretrievably scrambled). Black holes are the only known thing that may cause information to disappear from the universe - or not, that's the open question.
- chrischen 11y agoWhat about quantum mechanics? How can you get a true quantum random number generator if information is preserved?
- gizmo686 11y agoThe many worlds interpretations. Roughly speaking, if there is a quantum system that is in a superposition of states A and B, and we observe it, we then become entangled with it and are then in a superposition of having observed A and having observed B. No information has been lost from the universe, but there is no way for those of us living in the A state to observe anything about the B state.
- deleted 11y ago[deleted]
- eli_gottlieb 11y agoQuantum information is actually different from classical information (classical entropy). Quantum information is (believed to be?) a conserved quantity; classical is not (it never decreases). A quantum random number generator is just emitting quantum bits: without having had those qubits in the first place, you can't have computed them ahead-of-time, so they're random.
- solipsism 11y agoQuantum information is (believed to be?) a conserved quantity No it's not. Why are so many people making things up? QM does not even define a concept of a quantity called "information".