Homodyne tomography and the reconstruction of quantum states of light

Details Homodyne tomography and the reconstruction of quantum states of light Homodyne tomography and the reconstruction of quantum states of light

2005-07-08

arxiv.org/abs/quant-ph/0507078v1

Physics

Quantum Physics

18 pages, 4 figures. World Scientific style. Contribution for the book "Quantum Information with continous variables of atoms

Scientific paper

Quantum tomography is a procedure to determine the quantum state of a physical system, or equivalently, to estimate the expectation value of any operator. It consists in appropriately averaging the outcomes of the measurement results of different observables, obtained on identical copies of the same system. Alternatively, it consists in maximizing an appropriate likelihood function defined on the same data. The procedure can be also used to completely characterize an unknown apparatus. Here we focus on the electromagnetic field, where the tomographic observables are obtained from homodyne detection.

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