arXiv 1909.048872019-09hep-ph

中微子振荡中量子相干性的新物理效应

New physics effects on quantum coherence in neutrino oscillations

Khushboo Dixit, Ashutosh Kumar Alok

备注：: 8 pages, 2 figures; Matches published version
发表信息：: Eur. Phys. J. Plus (2021) 136:334
DOI：: 10.1140/epjp/s13360-021-01311-4

摘要：

在中微子振荡的背景下，量子关联的几种度量，如Leggett-Garg不等式和Bell型不等式已经被广泛研究。然而，这些分析是在中微子标准模型（SM）相互作用的假设下进行的。在这项工作中，我们研究了新的物理效应$l_1$ -范数为基础的措施的量子相干性，量化的量子嵌入在系统中，也是内在相关的各种措施的量子相关性。此外，它被认为是一个资源的理论工具，可以利用量子算法和量子信道的歧视。利用中性流非标准中微子相互作用（NSI）的有效拉格朗日量，以一种与模型无关的方式引入了新的物理效应。从最近的全球振荡实验分析，包括相干中微子核散射实验（COHERENT）数据的NSI参数的界限。在即将到来的DUNE实验设置的背景下，我们发现$θ_{12}$的LMA-光扇区的最有利组合（即，在所有中微子能量E和CP破坏相$δ$的情况下（除了E ~ 2 GeV附近的狭窄区域），正常质量有序的量子相干性（$θ_{12}< 45^o$）都比SM预言的要低。另一方面，在整个$(E-δ)$平面的相干参数的值的大的增强是可能的$θ_{12}$（$θ_{12}> 45^o$）与倒序的暗八分圆。对于几乎所有的CP破坏相位值，在DUNE实验中预期最大中微子通量的E ~ 4GeV附近的区域，增强更加突出。因此，对于正常的质量有序，SM相互作用为量子信息任务提供了有利的条件，而NSI有利于倒序的情况下，这样的任务。

英文摘要：

Several measures of quantum correlations such as Leggett-Garg and Bell-type inequalities have been extensively studied in the context of neutrino oscillations. However these analyses are performed under the assumption of standard model (SM) interactions of neutrinos. In this work we study new physics effects on $l_1$-norm based measure of quantum coherence which quantifies the quantumness embedded in the system and is also intrinsically related to various measures of quantum correlations. Moreover, it is considered to be a resource theoretical tool which can be utilized in quantum algorithms and quantum channel discrimination. The new physics effects are incorporated in a model independent way by using the effective Lagrangian for the neutral current non-standard neutrino interactions (NSI). Bounds on the NSI parameters are extracted from a recent global analysis of oscillation experiments including COHERENT (coherent neutrino-nucleus scattering experiment) data. In the context of upcoming DUNE experimental setup, we find that the most favourable combination of LMA-Light sector of $θ_{12}$ (i.e., $θ_{12}< 45^o$) with normal mass ordering decreases the coherence in the system in comparison to the SM prediction for all values of neutrino energy E and CP violating phase $δ$ (except in the narrow region around E ~ 2 GeV). On the other hand, a large enhancement in the value of coherence parameter in the entire $(E-δ)$ plane is possible for the dark octant of $θ_{12}$ ($θ_{12}> 45^o$) with inverted ordering. For almost all values of CP violating phase, the enhancement is more protuberant in the region around E ~ 4 GeV where maximum neutrino flux is expected in the DUNE experiment. Therefore for the normal mass ordering, the SM interaction provides favourable conditions for quantum information tasks while the NSI favours inverted ordering scenario for such tasks.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文