  It is well known that quantum effects may lead to remove the intrinsic
singularity point of back holes. Also, the quintessence scalar field is a
candidate model for describing late-time acceleration expansion. Accordingly,
Kazakov and Solodukhin considered the existence of back-reaction of the
spacetime due to the quantum fluctuations of the background metric to deform
Schwarzschild black hole, which led to change the intrinsic singularity of the
black hole to a 2-sphere with a radius of the order of the Planck length. Also,
Kiselev rewrote the Schwarzschild metric by taking into account the
quintessence field in the background. In this study, we consider the
quantum-corrected Schwarzschild black hole inspired by Kazakov-Solodukhin's
work, and Schwarzschild black hole surrounded by quintessence deduced by
Kiselev to study the mutual effects of quantum fluctuations and quintessence on
the accretion onto the black hole. Consequently, the radial component of
4-velocity and the proper energy density of the accreting fluid have a finite
value on the surface of its central 2-sphere due to the presence of quantum
corrections. Also, by comparing the accretion parameters in different kinds of
black holes, we infer that the presence of a point-like electric charge in the
spacetime is somewhat similar to some quantum fluctuations in the background
metric.
