论文标题
若烯 - 氟耦合系统中的信息和变色
Information and decoherence in a muon-fluorine coupled system
论文作者
论文摘要
量子系统的统一演变保留了其连贯性，但是系统及其环境之间的相互作用导致了变质，在该过程中，存储在系统中的量子信息被降低。在氟化物晶体中植入的带阳性的带阳性的载有载的muon实现了这种相干的量子系统，并且MUON和最近的邻近氟核旋转的纠缠导致可以检测和测量的MUON极化的振动时间依赖性。在这里，我们表明，可以精确建模更遥远的核自旋的破裂效果，从而非常详细地描述了连接Muon-Fluorine“系统”与其“环境”结合的反矫正过程，并允许我们跟踪系统熵作为量子信息的降级。这些结果表明了如何精确地量化植入量子晶体中的量子状状态的muon的自旋松弛，这一特征迄今仅在现象学上被描述。
The unitary evolution of a quantum system preserves its coherence, but interactions between the system and its environment result in decoherence, a process in which the quantum information stored in the system becomes degraded. A spin-polarized positively-charged muon implanted in a fluoride crystal realises such a coherent quantum system, and the entanglement of muon and nearest-neighbour fluorine nuclear spins gives rise to an oscillatory time-dependence of the muon polarization which can be detected and measured. Here we show that the decohering effect of more distant nuclear spins can be precisely modelled, allowing a very detailed description of the decoherence processes coupling the muon-fluorine 'system' with its 'environment', and allowing us to track the system entropy as the quantum information degrades. These results show how to precisely quantify the spin relaxation of muons implanted into quantum entangled states in fluoride crystals, a feature that has hitherto only been described phenomenologically.
