Physicists measure complementary properties using quantum clones
(PHYSorg.com Physics)

(Phys.org)-In quantum mechanics, it`s impossible to precisely and simultaneously measure the complementary properties (such as the position and momentum) of a quantum state. Now in a new study, physicists have cloned quantum states and demonstrated that, because the clones are entangled, it`s possible to precisely and simultaneously measure the complementary properties of the clones. These measurements, in turn, reveal the state of the input quantum system.