State tomography for two qubits using reduced densities

Details State tomography for two qubits using reduced densities State tomography for two qubits using reduced densities

2006-05-04

arxiv.org/abs/quant-ph/0605049v1

J. Phys. A: Math. Gen. 39, 10901-10907, 2006.

Physics

Quantum Physics

8 pages LATEX

Scientific paper

10.1088/0305-4470/39/34/020

The optimal state determination (or tomography) is studied for a composite
system of two qubits when measurements can be performed on one of the qubits
and interactions of the two qubits can be implemented. The goal is to minimize
the number of interactions to be used. The algebraic method applied in the
paper leads to an extension of the concept of mutually unbiased measurements.

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