  Symmetry imposes constraints on open quantum systems, affecting the
dissipative properties in nonequilibrium processes. Superradiance is a typical
example in which the decay rate of the system is enhanced via a collective
system-bath coupling that respects permutation symmetry. Such model has also
been applied to heat engines. However, a generic framework that addresses the
impact of symmetry in finite-time thermodynamics is not well established. Here,
we show a symmetry-based framework that describes the fundamental limit of
collective enhancement in finite-time thermodynamics. Specifically, we derive a
general upper bound on the average jump rate, which quantifies the fundamental
speed set by thermodynamic speed limits and trade-off relations. We identify
the symmetry condition which achieves the obtained bound, and explicitly
construct an open quantum system model that goes beyond the enhancement
realized by the conventional superradiance model.
