  Quantum simulators are controllable systems that can be used to simulate
other quantum systems. Here we focus on the dynamics of a chain of molecular
qubits with interposed antiferromagnetic dimers. We theoretically show that its
dynamics can be controlled by means of uniform magnetic pulses and used to
mimic the evolution of other quantum systems, including fermionic ones. We
propose two proof-of-principle experiments, based on the simulation of the
Ising model in transverse field and of the quantum tunneling of the
magnetization in a spin-1 system.
