Abstract

Many-spin entanglement is investigated in a gas of spin-carrying molecules (atoms) in a nanopore under NMR conditions with a dipolar ordered initial state. To estimate the number of entangled spins, the second moment of the distribution of the intensities of multiple quantum (MQ) NMR coherences is used, which provides a lower bound for the quantum Fisher information. Many-spin entanglement is investigated at different temperatures and different numbers of spins.

中文翻译：

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具有偶极有序初始状态的多量子NMR中的多旋缠结

摘要

在具有偶极有序初始状态的NMR条件下，在纳米孔中的自旋携带分子（原子）气体中研究了多自旋缠结。为了估计纠缠的自旋数，使用了多个量子（MQ）NMR相干强度分布的第二矩，它为量子Fisher信息提供了一个下限。研究了在不同温度和不同旋转次数下的多旋转缠结。