Quantifying quantum coherence in experimentally observed neutrino oscillations

Song, Xue-Ke1,2,3,4; Huang, Yanqi5,6; Ling, Jiajie7; Yung, Man-Hong1,2,4

2018-11-26

10.1103/PhysRevA.98.050302

PHYSICAL REVIEW A   影响因子和分区

2469-9926

2469-9934

Neutrino oscillation represents an intriguing physical phenomenon where the quantumness can be maintained and detected over a long distance. Previously, the nonclassical character of neutrino oscillation was tested with the Leggett-Garg inequality, where a clear violation of the classical bound was observed [J. A. Formaggio et al., Phys. Rev. Lett, 117, 050402 (2016)]. However, there are several limitations in testing neutrino oscillations with the Leggett-Garg inequality. In particular, the degree of violation of the Leggett-Garg inequality cannot be taken as a "measure of quantumness." Here, we focus on quantifying the quantumness of experimentally observed neutrino oscillation, using the tools of the recently developed quantum resource theory. We analyzed ensembles of reactor and accelerator neutrinos at distinct energies from a variety of neutrino sources, including Daya Bay (0.5 and 1.6 km), KamLAND (180 km), MINOS (735 km), and T2K (295 km). The quantumness of the three-flavored neutrino oscillation is characterized within a 3 sigma range relative to the theoretical prediction. It is found that the maximal coherence was observed in the neutrino source from the KamLAND reactor. However, even though the survival probability of the Daya Bay experiment did not vary significantly (it dropped about 10%), the coherence recorded can reach up to 40% of the maximal value. These results represent the longest distance over which quantumness was experimentally determined for quantum particles other than photons.

SCI ; EI

英语

NI论文

第一 ; 通讯

Postdoctoral Science Foundation of China[2018M632195]

Optics ; Physics

Optics ; Physics, Atomic, Molecular & Chemical

WOS:000451329500001

AMER PHYSICAL SOC

20184906175022

Neutrons

Quantum Theory; Quantum Mechanics:931.4

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
3.Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China
5.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
6.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
7.Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Guangdong, Peoples R China

Song, Xue-Ke,Huang, Yanqi,Ling, Jiajie,et al. Quantifying quantum coherence in experimentally observed neutrino oscillations[J]. PHYSICAL REVIEW A,2018,98(5).

Song, Xue-Ke,Huang, Yanqi,Ling, Jiajie,&Yung, Man-Hong.(2018).Quantifying quantum coherence in experimentally observed neutrino oscillations.PHYSICAL REVIEW A,98(5).

Song, Xue-Ke,et al."Quantifying quantum coherence in experimentally observed neutrino oscillations".PHYSICAL REVIEW A 98.5(2018).