Quantum Computers and Dissipation

Details Quantum Computers and Dissipation Quantum Computers and Dissipation

1997-01-31

arxiv.org/abs/quant-ph/9702001v1

Proc.Roy.Soc.Lond. A452 (1996) 567-584

Physics

Quantum Physics

20 pages, Latex, 7 Postscript figures

Scientific paper

We analyse dissipation in quantum computation and its destructive impact on efficiency of quantum algorithms. Using a general model of decoherence, we study the time evolution of a quantum register of arbitrary length coupled with an environment of arbitrary coherence length. We discuss relations between decoherence and computational complexity and show that the quantum factorization algorithm must be modified in order to be regarded as efficient and realistic.

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