Efficient tomography of quantum processes

Details Efficient tomography of quantum processes Efficient tomography of quantum processes

2010-10-04

arxiv.org/abs/1010.0472v1

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

We show with explicit formulas that one can completely identify an unknown quantum process with only one weakly entangled state; and identify a quantum optical Gaussian process with either one two-mode squeezed state or a few different coherent states. In tomography of a multi-mode process, our method reduces the number of different test states exponentially compared with existing methods.

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