Universal measurement of quantum correlations of radiation

Abstract

A measurement technique is proposed which, in principle, allows one to observe the general space-time correlation properties of a quantized radiation field. Our method, called balanced homodyne correlation measurement, unifies the advantages of balanced homodyne detection with those of homodyne correlation measurements.

4 pages, 4 figures, small misprints were corrected, accepted to Phys. Rev. Lett

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