  We study the Husimi distribution of the ground state in the Dicke model of
field-matter interactions to visualize the quantum phase transition, from
normal to superradiant, in phase-space. We follow an exact numerical and
variational analysis, without making use of the usual Holstein-Primakoff
approximation. We find that Wehrl entropy of the Husimi distribution provides
an indicator of the sharp change of symmetry trough the critical point.
Additionally, we note that the zeros of the Husimi distribution characterize
the Dicke model quantum phase transition.
