Violation of Bell's inequality for phase-singular beams
Source
Physical Review A Atomic Molecular and Optical Physics
ISSN
10502947
Date Issued
2015-08-14
Author(s)
Prabhakar, Shashi
Reddy, Salla Gangi
Aadhi, A.
Perumangatt, Chithrabhanu
Samanta, G. K.
Singh, R. P.
Abstract
We have considered optical beams with phase singularity and experimentally verified that these beams, although classical, have properties of two-mode entanglement in quantum states. We have observed the violation of Bell's inequality for continuous variables using the Wigner distribution function (WDF) proposed by P. Chowdhury et al. [Phys. Rev. A 88, 013830 (2013)PLRAAN1050-294710.1103/PhysRevA.88.013830]. Our experiment establishes an alternate form of Bell's inequality in terms of the WDF which can be used for classical as well as quantum systems.