Generation and Detection of Continuous Variable Quantum Vortex States via Compact Photonic Devices

Photonics

Jesús Liñares¹  David Barral¹  Daniel Balado¹ 

[1] Optics Area, Department of Applied Physics, Faculty of Physics and Faculty of Optics and Optometry, University of Santiago de Compostela, Campus Vida s/n (Campus Universitario Sur), Santiago de Compostela, Galicia E-15782, Spain;

关键词: quantum information processing;    continuous variables;    integrated optics;   

DOI  :  10.3390/photonics4010002

来源: DOAJ

【 摘 要 】

A quantum photonic circuit with the ability to produce continuous variable quantum vortex states is proposed. This device produces two single-mode squeezed states which go through a Mach-Zehnder interferometer where photons are subtracted by means of weakly coupled directional couplers towards ancillary waveguides. The detection of a number of photons in these modes heralds the production of a quantum vortex. Likewise, a measurement system of the order and handedness of quantum vortices is introduced and the performance of both devices is analyzed in a realistic scenario by means of the Wigner function. These devices open the possibility of using the quantum vortices as carriers of quantum information.

【 授权许可】

Unknown