  We revisit the slow-bond (SB) problem of the one-dimensional (1D) totally
asymmetric simple exclusion process (TASEP) with modified hopping rates. In the
original SB problem, it turns out that a local defect is always relevant to the
system as jamming, so that phase separation occurs in the 1D TASEP. However,
crossover scaling behaviors are also observed as finite-size effects. In order
to check if the SB can be irrelevant to the system with particle interaction,
we employ the condensation concept in the zero-range process. The hopping rate
in the modified TASEP depends on the interaction parameter and the distance up
to the nearest particle in the moving direction, besides the SB factor. In
particular, we focus on the interplay of jamming and condensation in the
current-density relation of 1D driven flow. Based on mean-field calculations,
we present the fundamental diagram and the phase diagram of the modified SB
problem, which are numerically checked. Finally, we discuss how the
condensation of holes suppresses the jamming of particles and vice versa, where
the partially-condensed phase is the most interesting, compared to that in the
original SB problem.
