Entanglement propagation of a quantum optical vortex state

OPTICS COMMUNICATIONS

卷:380

Article

Banerji, Anindya^1,2  Singh, Ravindra Pratap³  Banerjee, Dhruba¹  Bandyopadhyay, Abir² 

[1] Jadavpur Univ, Dept Phys, Kolkata 700032, India

[2] Hooghly Engn & Technol Coll, Hooghly 712103, India

[3] Phys Res Lab, Ahmadabad 380009, Gujarat, India

关键词: Quantum optical vortex;    Photon addition/subtraction;    Wigner function;    Entanglement;    Propagation;   

DOI  :  10.1016/j.optcom.2016.06.025

来源: Elsevier

【 摘 要 】

We study the entanglement evolution of a quantum optical vortex state propagating through coupled lossless waveguides. We consider states generated by coupling two squeezed modes using a sequence of beam splitters and also by subtracting photons from one of the output modes in spontaneous parametric down conversion. We use the Wigner function to study the variation in the structure of the vortex state with distance and quantify the entanglement after propagation using logarithmic negativity. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free