Quantum deletion is possible via a partial randomization procedure
An alternative kind of deleting/erasing operation is Introduced which differs from the commonly used controlled-not (C-not) conditional logica1 operation - to flip io a standard, 'zero' value the (classical or quantum) state of the last copy in a chain, in a deletion process. It is completely reversible, in the classical case, possessing a most natural cloning operation counterpart. We call this deleting procedure R-deletion since, in a way, it can be viewed as a 'randomization' of the standard C-not operator. It has the remarkable property of by¬passing in a simple manner the 'impossibility of deletion of a quantum state' principle, put forward by Pati and Braunstein [1].
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Issue: 7, 2004
Series of issue: Science (Special Release)
Rubric: Quantum Gravity and Cosmology
Pages: 11 — 14
Downloads: 969