Models of Quantum Computers and Decoherence Problem

Details Models of Quantum Computers and Decoherence Problem Models of Quantum Computers and Decoherence Problem

1999-02-15

arxiv.org/abs/quant-ph/9902055v1

Physics

Quantum Physics

14 pages, Latex, Invited talk at the International Conference on Quantum Information, Meijo University, Nagoya, 4-8 Nov.1997,

Scientific paper

Mathematical models of quantum computers such as a multidimensional quantum Turing machine and quantum circuits are described and its relations with lattice spin models are discussed. One of the main open problems one has to solve if one wants to build a quantum computer is the decoherence due to the coupling with the environment. We propose a possible solution of this problem by using a control of parameters of the system. This proposal is based on the analysis of the spin-boson Hamiltonian performed in the stochastic limit approximation.

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