Quantum mechanics and computation

Foundations of Science 9 (4):387-404 (2004)
In quantum computation non classical features such as superposition states and entanglement are used to solve problems in new ways, impossible on classical digital computers.We illustrate by Deutsch algorithm how a quantum computer can use superposition states to outperform any classical computer. We comment on the view of a quantum computer as a massive parallel computer and recall Amdahls law for a classical parallel computer. We argue that the view on quantum computation as a massive parallel computation disregards the presence of entanglement in a general quantum computation and the non classical way in which parallel results are combined to obtain the final output.
Keywords quantum computation  parallel computers
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DOI 10.1007/s10699-005-4827-y
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References found in this work BETA
D. Deutsch (1986). In R. Penrose and CJ Isham, Editors. In Roger Penrose & C. J. Isham (eds.), Quantum Concepts in Space and Time. New York ;Oxford University Press
Richard Jozsa & Noah Linden (2003). On the Role of Entanglement in Quantum-Computational Speed-Up. Proceedings of the Royal Society of London. Series A. Mathematical, Physical and Engineering Sciences 459:2011--2032.
P. Shor (1994). Algorithms for Quantum Computation: Discrete Logarithms and Factoring. Proceedings of the 35th Annual IEEE Symposium on Foundations of Computer Science:124-134.

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