Quantum Entanglement in Time

Caslav Brukner, Samuel Taylor, Sancho Cheung, Vlatko Vedral

Published 2004-02-18Version 1

The temporal Bell inequalities are derived from the assumptions of realism and locality in time. It is shown that quantum mechanics violates these inequalities and thus is in conflict with the two assumptions. This can be used for performing certain tasks that are not possible classically. Our results open up a possibility for introducing the notion of entanglement in time in quantum physics.