Adaptive Quantum Homodyne Tomography

Details Adaptive Quantum Homodyne Tomography Adaptive Quantum Homodyne Tomography

1998-12-14

arxiv.org/abs/quant-ph/9812028v1

Phys.Rev. A60 (1999) 518

Physics

Quantum Physics

Latex (RevTex class + psfig), 9 Figs, Submitted to PRA

Scientific paper

10.1103/PhysRevA.60.518

An adaptive optimization technique to improve precision of quantum homodyne tomography is presented. The method is based on the existence of so-called null functions, which have zero average for arbitrary state of radiation. Addition of null functions to the tomographic kernels does not affect their mean values, but changes statistical errors, which can then be reduced by an optimization method that "adapts" kernels to homodyne data. Applications to tomography of the density matrix and other relevant field-observables are studied in detail.

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