In this work we apply the principles of adiabatic quantum computation (AQC) in order to define an efficient quantum state preparation scheme in the realm of integrated linear optics. This is achieved by performing an adiabatic coupling of the waveguides and the waveguide propagation constants. The transition is defined in such a way that the eigenvalues of the initial and final hamiltonian of the system coincide. The resulting device then maps any input Fock-state to an eigenstate of the final system for an arbitrary number of photons. Our protocol can also be viewed as an analog quantum eigenstate solver for bosonic particles in tight-binding lattices.
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