  Fermion soliton stars are a consistent model of exotic compact objects which
involve a nonlinear interaction between a real scalar field and fermions
through a Yukawa term. This interaction results in an effective fermion mass
that depends upon the vacuum structure in the scalar potential. In this work we
investigate the tidal deformations of fermion soliton stars and compute the
corresponding tidal Love numbers for different model parameters. Furthermore,
we discuss the existence of approximate universal relations for the electric
and magnetic tidal deformabilities of these stars, and compare them with other
solutions of general relativity, such as neutron stars or boson stars. These
relations for fermion soliton stars are less universal than for neutron stars,
but they are sufficiently different from the ordinary neutron star case that a
measurement of the electric and magnetic tidal Love numbers (as potentially
achievable by next-generation gravitational wave detectors) can be used to
disentangle these families of compact objects. Finally, we discuss the
conditions for tidal disruption of fermion soliton stars in a binary system and
estimate the detectability of the electromagnetic signal associated with such
tidal disruption events.
