Information and Decoherence in a Muon-Fluorine Coupled System.
Information and Decoherence in a Muon-Fluorine Coupled System.
复制标题
μ子-氟耦合系统中的信息和退相干。
DOI:
10.1103/physrevlett.125.087201
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发表时间:
2020
影响因子:
8.6
通讯作者:
Wilkinson JM
中科院分区:
文献类型:
--
作者:
Wilkinson JM
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 realizes such a coherent quantum system, and the entanglement of muon and nearest-neighbor fluorine nuclear spins gives rise to an oscillatory time dependence of the muon polarization that can be detected and measured. Here we show that the decohering effect of more distant nuclear spins can be modelled quantitatively, 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.
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