Figure 2
From: Experimental test of the no-go theorem for continuous ψ-epistemic models
Experimental setup for producing a narrowband heralded single-photon source and testing the no-go theory for continuous ψ-epistemic models.
The 85Rb atomic energy levels are chosen as 
, 
, 
and 
. Conditioned upon the detection (D0) of the Stokes photon, its paired anti-Stokes photons pass through an EOAM driven by a train signal of d pulses with one missing. A beam splitter (BS) and two detectors (D1 and D2) are used to verify the single photon quantum nature.
