逐步打开薛定谔的盒子揭示了一系列尖锐的动力学转变
Gradually opening Schrödinger's box reveals a cascade of sharp dynamical transitions
AI总结：
通过调节超导量子比特的测量强度，研究揭示了测量主导动力学通过三个尖锐转变从量子动力学中出现，退相干重新组织了这些转变的顺序。
摘要：
量子力学预测未被观测的系统可能处于状态的叠加中，但测量会产生确定的结果，这是量子到经典边界的张力所在。随着观测强度的增加，这两个对立领域之间的转变如何展开仍未被实验探索。在此，通过连续调节超导量子比特上的测量强度，我们发现测量主导的动力学并非逐渐出现，而是通过三个不同的转变：相干振荡突然停止；系统随后冻结在稳定的量子态附近；最后进入量子芝诺 regime，其中更强的观测反而减缓了弛豫。退相干而非抹去这种结构，重新组织了它，在理想化模型中重合的特征被倒置，并解耦。这些结果表明，从量子动力学到测量主导行为的路线通过观测与环境相互作用的相互作用而由尖锐的转变决定。
英文摘要：
Quantum mechanics predicts that unobserved systems may exist in a superposition of states, yet measurement produces definite outcomes, a tension at the heart of the quantum-to-classical boundary. How the transformation between these opposing regimes unfolds as observation strength increases has remained experimentally unexplored. Here, by continuously tuning the measurement strength on a superconducting qubit, we reveal that measurement-dominated dynamics emerge not gradually but through three distinct transitions: coherent oscillations abruptly halt; the system then freezes near a stable quantum state; and finally enters the quantum Zeno regime, where stronger observation paradoxically slows relaxation. Decoherence, rather than washing out this structure, reorganizes it, inverting the order in which transitions appear and decoupling signatures that coincide in idealized models. These results establish that the route from quantum dynamics to measurement-dominated behavior unfolds in sharp transitions governed by the interplay between observation and environment.
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