Experimental realization of popper's experiment: Violation of the uncertainty principle?

An entangled pair of photons (1 and 2) are emitted in opposite directions. A narrow slit is placed in the path of photon 1 to provide the precise know ledge of its position on the y-asis and this also determines the precise y- position of its twin, photon 2, due to quantum entanglement. Is photon 2 go ing to experience a greater uncertainty in momentum, that is, a greater Del ta p(y) because of the precise knowledge of its position y? The experimenta l data show Delta y Delta p(y) < h for photon 2. Can this recent realizatio n of the thought experiment of Karl Popper signal at violation of the uncer tainty principle?