  Cooper pair splitters are promising candidates for generating spin-entangled
electrons. However, the splitting of Cooper pairs is a random and noisy
process, which hinders further synchronized operations on the entangled
electrons. To circumvent this problem, we here propose and analyze a dynamic
Cooper pair splitter that produces a noiseless and regular flow of
spin-entangled electrons. The Cooper pair splitter is based on a superconductor
coupled to quantum dots, whose energy levels are tuned in and out of resonance
to control the splitting process. We identify the optimal operating conditions
for which exactly one Cooper pair is split per period of the external drive and
the flow of entangled electrons becomes noiseless. To characterize the
regularity of the Cooper pair splitter in the time domain, we analyze the
$g^{(2)}$-function of the output currents and the distribution of waiting times
between split Cooper pairs. Our proposal is feasible using current technology,
and it paves the way for dynamic quantum information processing with
spin-entangled electrons.
