Experimental Quantum Averaging of Squeezed Quadratures
Mikael Lassen, Lars S. Madsen, Metin Sabuncu, Radim Filip, Ulrik L. Andersen · 2010
We demonstrate an averaging process, corresponding to the harmonic-mean, that average quantum noise sources better than the basic arithmetic-mean strategy. Using simple linear optics, homodyne detection and feedforward, and it is tested on squeezed states.