Generating a perfect quantum optical vortex

Abstract

In this article we introduce a novel quantum state, the perfect quantum optical vortex state which exhibits a highly localised distribution along a ring in the quadrature space. We examine its nonclassical properties using the Wigner function and the negativity volume. Such a quantum state can be a useful resource for quantum information processing and communication.Comment: 6 pages, 5 figure

Quantitative orbital angular momentum measurement of perfect vortex beams

“…PVs with OAM have been extensively created [12][13][14][15][16][17][18][19] and applied [20][21][22][23][24][25], but measurement techniques are still in their infancy [26]. In contrast, OAM has been measured qualitatively using mode sorters for Laguerre-Gaussian and helical beams [27][28][29][30], extended to radial modes [31,32], with adapted approaches to find the mode indices for Bessel-Gaussian [33][34][35] and Hermite-Gaussian modes [36].…”

Generalized perfect optical vortices along arbitrary trajectories

“…Optical vortex beams with the helical wavefronts carry the orbital angular momentum (OAM) [1] of 𝑙ℏ per photon (𝑙 is the topological charge and ℏ is the reduced Planck constant), which was recognized by Allen et al in 1992 [2]. The pioneering work has excited the intense researches about OVs in various applications including manipulation of micro-particles [3], optical communication [4,5], quantum information [6][7][8], plasma diagnostics [9][10][11], optical imaging and probing [12], and plasmonics [13,14]. Among these applications, the widely used vortex beams, such as Laguerre-Gaussian and Bessel beams, have the radii of their annular rings determined by their topological charges.…”

Generation of perfect vortex and vector beams based on Pancharatnam-Berry phase elements

“…Theoretically, PV beam is the Fourier transformation of a Bessel Gaussian (BG) beam 4 . Plenty of schemes have been proposed to obtain the PV beams including using spatial light modulator 3 4 5 6 7 , axicon 8 9 , interferometer 10 , and micro-mirror devices 11 . Optical manipulation based on the tightly focused field of PV beams has also been extensively studied 8 12 .…”