Approximate Quantum Fourier Transform and Decoherence

Details Approximate Quantum Fourier Transform and Decoherence Approximate Quantum Fourier Transform and Decoherence

1996-01-21

arxiv.org/abs/quant-ph/9601018v1

Physics

Quantum Physics

14 pages, 10 fig. (8 *.eps files). More information on http://eve.physics.ox.ac.uk/QChome.html http://www.physics.helsinki.f

Scientific paper

10.1103/PhysRevA.54.139

We discuss the advantages of using the approximate quantum Fourier transform (AQFT) in algorithms which involve periodicity estimations. We analyse quantum networks performing AQFT in the presence of decoherence and show that extensive approximations can be made before the accuracy of AQFT (as compared with regular quantum Fourier transform) is compromised. We show that for some computations an approximation may imply a better performance.

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