Open AccessExperimental characterization of continuous-variable orbital angular momentum entanglement using Stokes-operator basis
Author(s) -
Chunxiao Cai,
Long Ma,
Juan Li,
Guo Hui,
Kui Liu,
Hengxin Sun,
Jiangrui Gao
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.005724
Subject(s) - quantum entanglement , physics , angular momentum , operator (biology) , quantum mechanics , optics , classical mechanics , quantum , biochemistry , chemistry , repressor , transcription factor , gene
The continuous-variable (CV) orbital angular momentum (OAM) entanglement is very different to the traditional quadrature entanglement. The Stokes-operators directly reflect the character of OAM light. Here, we report the first direct experimental demonstration the Stokes-operator entanglement of continuous-variable OAM entanglement. Generated by transforming quadrature entanglement in the HG 01 mode onto the orbital Stokes-operator basis, the entanglement is measured in the Stokes-operator basis using a self-designed detection scheme. An inseparability of I(O^ 2 ,O^ 3 )<1 is achieved over a wide analyzing frequency of 1-10 MHz. Moreover, experimental fluctuations at 5.0 MHz are visualized using the quantum orbital Poincaré sphere representation. The OAM entanglement with Stokes-operators measurement has a promising application in certain nonlocal quantum information protocols and rotational optomechanics by interacting with nanoparticle or atoms.