SU(2) coherent states in parametric down-conversion
Alfredo Luis, Jan Peřina · Physical Review A · 1996
The states generated from the vacuum in two parametric down-conversion crystals with aligned idler beams are studied. It is shown that after a measurement of the photon number in some of the modes, the emerging states can be related to SU(2) and SU(1,1) coherent and minimum-uncertainty states. \textcopyright{} 1996 The American Physical Society.