  A noteworthy discovery in recent research is that the process of two-qubit
quantum entanglement preparation can be significantly accelerated near the
exceptional point (EP) or spectral coalescence of non-Hermitian systems, as
compared to conventional Hermitian setups. Nevertheless, a significant obstacle
for quantum EP-based devices is their limited success rate in generating highly
entangled states, stemming from an inherent trade-off relation between
entanglement degree and success rate in all lossy EP systems. Our study
demonstrates that this limitation can be effectively overcome by harnessing a
truly parity-time ($\mathcal{PT}$)-symmetric system, which possesses balanced
gain and loss, thereby enabling maximal entanglement with rapid speed, high
success rates, and greater resilience to non-resonant errors. We believe this
approach can efficiently prepare multi-qubit entanglement and use not only
bipartite but also tripartite entanglement as examples to illustrate, even when
the precise gain-loss balance is not strictly maintained. Our analytical
findings are in excellent agreement with numerical simulations, confirming the
potential of $\mathcal{PT}$-devices as a powerful tool for creating and
engineering diverse quantum resources for applications in quantum information
technology.
