  By exploring the extraordinary property of exceptional points (EPs) in
non-Hermitian systems, we here demonstrate that losses can play constructive
roles in controlling bistable states. We experimentally realize the EP in a
non-Hermitian meta-molecule of coupled resonators in microwave regime. By
increasing the loss, we first observe the bistable state suppression at the
weak-dissipative regime, but then the bistable state recovery in
strong-dissipative regime. Both the experimental and theoretical analysis
demonstrate that the revival of bistable states results from the revival of the
field intensity after the system encounters EPs, in spite of the increasing
loss. Our results provide an alternative way to controlling and manifesting
bistable systems, so as to achieve flexible photonic devices, not limited to
the microwave regime.
