Analysis of Density Matrix reconstruction in NMR Quantum Computing

Details Analysis of Density Matrix reconstruction in NMR Quantum Computing Analysis of Density Matrix reconstruction in NMR Quantum Computing

2000-12-12

arxiv.org/abs/quant-ph/0012047v2

J. Opt. B: quantum semiclass Opt. 3(2001) 376-381

Physics

Quantum Physics

7 pages, title slightly changed and references added

Scientific paper

10.1088/1464-4266/3/6/305

Reconstruction of density matrices is important in NMR quantum computing. An analysis is made for a 2-qubit system by using the error matrix method. It is found that the state tomography method determines well the parameters that are necessary for reconstructing the density matrix in NMR quantum computations. Analysis is also made for a simplified state tomography procedure that uses fewer read-outs. The result of this analysis with the error matrix method demonstrates that a satisfactory accuracy in density matrix reconstruction can be achieved even in a measurement with the number of read-outs being largely reduced.

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