Models to Reduce the Complexity of Simulating a Quantum Computer

Details Models to Reduce the Complexity of Simulating a Quantum Computer Models to Reduce the Complexity of Simulating a Quantum Computer

1997-12-02

arxiv.org/abs/quant-ph/9712004v1

Physics

Quantum Physics

25 pages

Scientific paper

Recently Quantum Computation has generated a lot of interest due to the discovery of a quantum algorithm which can factor large numbers in polynomial time. The usefulness of a quantum com puter is limited by the effect of errors. Simulation is a useful tool for determining the feasibility of quantum computers in the presence of errors. The size of a quantum computer that can be simulat ed is small because faithfully modeling a quantum computer requires an exponential amount of storage and number of operations. In this paper we define simulation models to study the feasibility of quantum computers. The most detailed of these models is based directly on a proposed imple mentation. We also define less detailed models which are exponentially less complex but still pro duce accurate results. Finally we show that the two different types of errors, decoherence and inaccuracies, are uncorrelated. This decreases the number of simulations which must be per formed.

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