Modifying quantum optical states by zero-photon subtraction
Cory M. Nunn, J. D. Franson, T. B. Pittman · Physical Review A · 2022
The authors experimentally demonstrate that, counterintuitively, the heralding of zero photons in an ancillary mode can reduce the mean photon number in an optical mode despite the fact that no photons have been removed from the system. This scheme finds an immediate application in the process of noiseless attenuation.