  Quantum resetting protocols allow a quantum system to be sent to a state in
the past by making it interact with quantum probes when neither the free
evolution of the system nor the interaction is controlled. We experimentally
verify the simplest non-trivial case of a quantum resetting protocol, known as
the $\mathcal{W}_4$ protocol, with five superconducting qubits, testing it with
different types of free evolutions and target-probe interactions. After
projection, we obtained a reset state fidelity as high as $0.951$, and the
process fidelity was found to be $0.792$. We also implemented 100
randomly-chosen interactions and demonstrated an average success probability of
$0.323$ for $|1\rangle$ and $0.292$ for $|-\rangle$, experimentally confirmed
the nonzero probability of success for unknown interactions; the numerical
simulated values are about $0.3$. Our experiment shows that the simplest
quantum resetting protocol can be implemented with current technologies, making
such protocols a valuable tool in the eternal fight against unwanted evolution
in quantum systems.
