Quantum state measurement by realistic heterodyne detection

Details Quantum state measurement by realistic heterodyne detection Quantum state measurement by realistic heterodyne detection

1995-11-14

arxiv.org/abs/quant-ph/9511017v1

Phys.Rev.A53:2658,1996

Physics

Quantum Physics

Revtex. 5 figures, PostScript files available from the author. Submitted to PRA

Scientific paper

10.1103/PhysRevA.53.2658

The determination of the quantum properties of a single mode radiation field by heterodyne or double homodyne detection is studied. The realistic case of not fully efficient photodetectors is considered. It is shown that a large amount of quite {\em precise} information is avalaible whereas the completeness of such information is also discussed. Some examples are given and the special case of states expressed as a finite superposition of number states is considered in some detail.

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