  The first post-classical computation will most probably be performed not on a
universal quantum computer, but rather on a dedicated quantum hardware. A
strong candidate for achieving this is represented by the task of sampling from
the output distribution of linear quantum optical networks. This problem, known
as boson sampling, has recently been shown to be intractable for any classical
computer, but it is naturally carried out by running the corresponding
experiment. However, only small scale realizations of boson sampling
experiments have been demonstrated to date. Their main limitation is related to
the non-deterministic state preparation and inefficient measurement step. Here,
we propose an alternative setup to implement boson sampling that is based on
microwave photons and not on optical photons. The certified scalability of
superconducting devices indicates that this direction is promising for a
large-scale implementation of boson sampling and allows for more flexible
features like arbitrary state preparation and efficient photon-number
measurements.
