From: "James N Rose" > "Conservation" as a 'fundamental rule of condition' > is incompatible and antithetical with any notions > of "many worlds".
Are conservation principles only defined in closed systems? Is a 'world' a closed system? There is, i.e., a no-deleting theorem (similar to the no-cloning theorem) saying that given 2 qubits in unknown and equal states, one cannot take one of them to a fixed state, keeping the other in the original state. In other terms |psi>|psi> --> |psi>|0> is forbidden. But, of course, it is possible to delete a quantum state by trowing it out of that system, out of that world. s.
