Physics – Quantum Physics
Scientific paper
2008-11-22
Physics
Quantum Physics
4 pages 6x9 page format, 2 figures
Scientific paper
Under the operational restriction of the U(1)-superselection rule, states that contain coherences between eigenstates of particle number constitute a resource. Such resources can be used to facilitate operations upon systems that otherwise cannot be performed. However, the process of doing this consumes reference resources. We show this explicitly for an example of a unitary operation that is forbidden by the U(1)-superselection rule.
Vaccaro Joan A.
White Andrew G.
Wiseman Howard M.
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