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 \(\left|1\right\rangle\) and 0.292 for \(\left|-\right\rangle\), and 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.

量子重置协议允许量子系统通过与量子探针进行交互，从而既不控制系统的自由演化也不控制交互作用，从而将其发送到过去的状态。我们通过实验验证了量子重置协议的最简单的非平凡情况，称为\（{{\ mathcal {W}}} __ 4} \）协议，其中包含五个超导量子位，并用不同类型的自由演化对其进行了测试以及目标与探针之间的相互作用。投影后，我们获得了高达0.951的重置状态保真度，而过程保真度为0.792。我们还实施了100个随机选择的互动和展示的0.323的平均成功概率\（\左| 1 \右\ rangle \）和0.292的\（\左| - \右\ rangle \），并通过实验确认了未知互动成功的非零概率；数值模拟值约为0.3。我们的实验表明，最简单的量子重置协议可以用当前技术实现，从而使此类协议成为永恒对抗量子系统中有害进化的有价值的工具。