3 ms·
You can't erase it in the physics sense, but you can erase information in an engineering sense, such that it is irretrievable in practice. NAND gates erase info
by dreamcompiler 3y ago
You can't erase it in the physics sense, but you can erase information in an engineering sense, such that it is irretrievable in practice. NAND gates erase information this way; given an output, there's no way to determine in all cases what the inputs were.
- cperciva 3y agoA NAND gate doesn't erase information; you still have the inputs. In Quantum computers it's more a matter of "overwriting" a qubit with a new value.
- dreamcompiler 3y agoEvery gate that has more inputs than outputs erases information. (NOT gates don't erase information.) Quantum gates generally have the same number of outputs as inputs, so they don't erase.