Entanglement and collective flavor oscillations in a dense neutrino gas
Entanglement and collective flavor oscillations in a dense neutrino gas
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DOI：
10.1103/physrevd.100.083001
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发表时间：
2019-10
影响因子：
5
通讯作者：
Michael J. Cervia;A. Patwardhan;A. Balantekin;S. Coppersmith;C. Johnson
中科院分区：
文献类型：
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作者：
Michael J. Cervia;A. Patwardhan;A. Balantekin;S. Coppersmith;C. Johnson
我们研究了超越平均场近似在集体中微子振荡动力学中的重要性。为了扩大我们对相干中微子振荡问题的理解，我们应用了多体物理和量子信息理论的概念。具体地说，我们使用多体系统的组成中微子之间的非平凡关联(也称为“纠缠”)的度量，例如纠缠熵和约化密度矩阵的Bloch矢量。通过对不同初始条件下多体图像中微子态的演化与平均场极限的比较，证明了超越平均场的关联性。
We investigate the importance of going beyond the mean-field approximation in the dynamics of collective neutrino oscillations. To expand our understanding of the coherent neutrino oscillation problem, we apply concepts from many-body physics and quantum information theory. Specifically, we use measures of nontrivial correlations (otherwise known as "entanglement") between the constituent neutrinos of the many-body system, such as the entanglement entropy and the Bloch vector of the reduced density matrix. The relevance of going beyond the mean field is demonstrated by comparisons between the evolution of the neutrino state in the many-body picture vs the mean-field limit, for different initial conditions.