Probabilistic programmable quantum processors with multiple copies of program state

Details Probabilistic programmable quantum processors with multiple copies of program state Probabilistic programmable quantum processors with multiple copies of program state

2005-05-27

arxiv.org/abs/quant-ph/0505202v1

Physical Review A, vol. 71, p. 032306, 2005

Physics

Quantum Physics

8 pages, 5 figures

Scientific paper

10.1103/PhysRevA.71.032306

We examine the execution of general U(1) transformations on programmable quantum processors. We show that, with only the minimal assumption of availability of copies of the one-qubit program state, that the apparent advantage of existing schemes proposed by G.Vidal it et al. [Phys. Rev. Lett. 88, 047905 (2002)] and M.Hillery et al. [Phys. Rev. A. 65, 022301 (2003)] to execute a general U(1) transformation with greater probability using complex program states appears not to hold.

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