Figure 3
From: Internal dynamics of intense twin beams and their coherence
(a) Spatial radial and (b) spectral widths 
and 
of intensity auto- (
, black) and cross-correlation (Δ, red) functions, respectively, versus pump power P; experiment (isolated symbols with error bars18), GPA (solid curves with symbols), SCM (dashed curves with symbols); 
, 
, 
and 
(
) are the spatial (spectral) Schmidt modes of field b, 
. For more details, see17. All 4 curves in (a) and (b) nearly coincide.
