Distribution of the conductance peak height parametric derivatives in the Coulomb-blockade regime

We propose the distributions of the conductance parametric:derivatives as s tatistical measures to study the conductance fluctuations at the Coulomb bl ockade regime. We assume the electronic dynamics of the dot to be chaotic a nd model its Hamiltonian by random matrices: For the unitary case, we obtai n the universal distribution of conductance slopes at peak heights analytic ally. Other distributions are obtained numerically. Our theoretical results can be verified with the available experimental:data, providing additional insight into the validity of the single-particle theory for the Coulomb bl ockade regime.