  We investigate the autocorrelator of conductance peak heights for quantum
dots in the Coulomb blockade regime. Analytical and numerical results based on
Random Matrix Theory are presented and compared to exact numerical calculations
based on a simple dynamical model. We consider the case of preserved
time-reversal symmetry, which is realized experimentally by varying the shape
of the quantum dot in the absence of magnetic fields. Upon a proper rescaling,
the correlator becomes independent of the details of the system and its form is
solely determined by symmetry properties and the number of channels in the
leads. The magnitude of the scaling parameter is estimated by a semiclassical
approach.
