[79] A remark on quantum cloning

Christian de Ronde and Massimiliano Sassoli de Bianchi

Physical entities are not truly teleported in so-called quantum teleportation, only their states are. Similarly, physical entities are not truly cloned in so-called quantum cloning, only their states are. The celebrated no-cloning theorem tells us that a universal cloning machine, able to perfectly clone arbitrary states, cannot be built. However, this only applies to discernible quantum entities. For the indiscernible ones, which are already perfect clones of one another, the additional cloning of their state is in fact a natural process, which happens in a spontaneous way, as soon as they are allowed to interact.

De Ronde, C. & Sassoli de Bianchi, M. (2019). A remark on quantum cloning. Revista Brasileira de Ensino de Física 41, e20190033. Doi: 10.1590/1806-9126-RBEF-2019-0033.

2019, 3 Pagine
English