  Coherent quantum control over many-particle quantum systems requires high
fidelity dynamics. One way of achieving this is to use adiabatic schemes where
the system follows an instantaneous eigenstate of the Hamiltonian over
timescales that do not allow transitions to other states. This, however, makes
control dynamics very slow. Here we introduce another concept that takes
advantage of preventing unwanted transitions in fermionic systems by using
Pauli blocking: excitations from a protected ground state to higher-lying
states are avoided by adding a layer of buffer fermions, such that the
protected fermions cannot make a transition to higher lying excited states
because these are already occupied. This allows to speed-up adiabatic
evolutions of the system. We do a thorough investigation of the technique, and
demonstrate its power by applying it to high fidelity transport, trap expansion
and splitting in ultracold atoms systems in anharmonic traps. Close analysis of
these processes also leads to insights into the structure of the orthogonality
catastrophe phenomenon.
