Measuring correlations in non-separable vector beams using projective measurements

OPTICS COMMUNICATIONS

卷:399

Article

Subramanian, Keerthan¹  Viswanathan, Nirmal K.² 

[1] Tata Inst Fundamental Res, Ctr Interdisciplinary Sci, Hyderabad 500075, Andhra Prades, India

[2] Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Prades, India

关键词: Vector beam;    Correlation measurement;    Bell's inequality;    Spin angular momentum;    Orbital angular momentum;   

DOI  :  10.1016/j.optcom.2017.04.060

来源: Elsevier

【 摘 要 】

Doubts regarding the completeness of quantum mechanics as raised by Einstein, Podolsky and Rosen(EPR) have predominantly been resolved by resorting to a measurement of correlations between entangled photons which clearly demonstrate violation of Bell's inequality. This article is an attempt to reconcile incompatibility of hidden variable theories with reality by demonstrating experimentally a violation of Bell's inequality in locally correlated systems whose two degrees of freedom, the spin and orbital angular momentum, are maximally correlated. To this end we propose and demonstrate a linear, achromatic modified Sagnac interferometer to project orbital angular momentum states which we combine with spin projections to measure correlations.

【 授权许可】

Free