%0 Journal Article
%T A convenient method to prepare the effective pure state in a quantum ensemble
%A Xijia Miao
%J Physics
%D 2000
%I arXiv
%X A simple method is proposed to prepare conveniently the effective pure state |00...0><0...00| with any number of qubits in a quantum ensemble. The preparation is based on the temporal averaging (Knill, Chuang, and Laflamme, Phys.Rev.A 57, 3348(1998)). The quantum circuit to prepare the effective pure state is designed in a unified and systematical form and is explicitly decomposed completely into a product of a series of one-qubit quantum gates and the two-qubit diagonal quantum gates. The preparation could be programmed and implemented conveniently on an NMR quantum computer.
%U http://arxiv.org/abs/quant-ph/0008094v1