Size invariant twisted optical modes for efficient generation of higher dimensional quantum states

• URL: http://arxiv.org/abs/2107.02227v1
• Date: Mon, 5 Jul 2021 18:53:50 GMT
• Title: Size invariant twisted optical modes for efficient generation of higher dimensional quantum states
• Authors: Ali Anwar, Shashi Prabhakar, R. P. Singh
• Abstract summary: Perfect optical vortex beams have their transverse intensity distribution independent of their charge. POV beams have found exciting applications in optical manipulation, imaging and communication.
• Score: 4.9797021649273985
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Optical vortex beams are profiled as helical wavefronts with a phase singularity carrying an orbital angular momentum (OAM) associated with their spatial distribution. The transverse intensity distribution of a conventional optical vortex has a strong dependence on the carried topological charge. However, perfect optical vortex (POV) beams have their transverse intensity distribution independent of their charge. Such `size-invariant' POV beams have found exciting applications in optical manipulation, imaging and communication. In this article, we investigate the use of POV modes in the efficient generation of high dimensional quantum states of light. We generate heralded single photons carrying OAM using spontaneous parametric down-conversion (SPDC) of POV beams. We show that the heralding efficiency of the SPDC single photons generated with POV pump is greater than that with normal optical vortex beams. The dimensionality of the two-photon OAM states is increased with POV modes in the pump and projective measurements using Bessel-Gaussian vortex modes that give POV, instead of the Laguerre-Gaussian modes.

Related papers

• Shaping entangled photons through thick scattering media using an advanced wave beacon [0.0]
  Entangled photons propagate through a complex medium such as a biological tissue or a turbulent atmosphere. Using wavefront shaping to compensate for the scattering and retrieve the two-photon correlations is challenging due to the low signal-to-noise ratio. We propose and demonstrate a new feedback mechanism that is inspired by Klyshko's advanced wave picture.
  arXiv  Detail & Related papers  (2024-03-27T07:56:13Z)
• Stimulated emission tomography for efficient characterization of spatial entanglement [2.3712403308529137]
  We show that stimulated emission increases the average number of detected photons by several orders of magnitude compared to the spontaneous process. In a SET measurement, the parametric down-conversion is seeded by an intense signal field prepared with specified mode properties. We observe strong idler production and good agreement with the theoretical prediction of its spatial mode distribution.
  arXiv  Detail & Related papers  (2024-03-08T04:27:19Z)
• Classical Model for Broadband Squeezed Vacuum Driving Two-Photon Absorption or Sum Frequency Generation [0.0]
  We study two-photon absorption (TPA) and sum-frequency generation (SFG) driven by weak or bright broadband squeezed vacuum with time-frequency entanglement between photons. We find that the classical model yields exactly the same predictions as the full quantum-field theory for all of the phenomena considered here, in both the low-gain and high-gain regimes of squeezed vacuum. Such predictions include the linear-flux scaling of TPA and SFG rates at low incident photon flux, as well as the dependence of TPA and SHG rates on the relative linewidths of the squeezed light and the ground
  arXiv  Detail & Related papers  (2023-09-09T17:12:54Z)
• Shaping Single Photons through Multimode Optical Fibers using Mechanical Perturbations [55.41644538483948]
  We show an all-fiber approach for controlling the shape of single photons and the spatial correlations between entangled photon pairs. We optimize these perturbations to localize the spatial distribution of a single photon or the spatial correlations of photon pairs in a single spot.
  arXiv  Detail & Related papers  (2023-06-04T07:33:39Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• Regression of high dimensional angular momentum states of light [47.187609203210705]
  We present an approach to reconstruct input OAM states from measurements of the spatial intensity distributions they produce. We showcase our approach in a real photonic setup, generating up-to-four-dimensional OAM states through a quantum walk dynamics.
  arXiv  Detail & Related papers  (2022-06-20T16:16:48Z)
• Complete conversion between one and two photons in nonlinear waveguides with tailored dispersion [62.997667081978825]
  We show theoretically how to control coherent conversion between a narrow-band pump photon and broadband photon pairs in nonlinear optical waveguides. We reveal that complete deterministic conversion as well as pump-photon revival can be achieved at a finite propagation distance.
  arXiv  Detail & Related papers  (2021-10-06T23:49:44Z)
• Room-temperature on-chip orbital angular momentum single-photon sources [2.6929576641257778]
  On-chip sources carrying orbital angular momentum (OAM) are in demand for high-capacity optical information processing. We demonstrate a room-temperature on-chip integrated OAM source that emits well-collimated single photons. Our OAM single-photon sources bridge the gap between conventional OAM manipulation and nonclassical light sources.
  arXiv  Detail & Related papers  (2021-04-02T15:57:34Z)
• Quantum Borrmann effect for dissipation-immune photon-photon correlations [137.6408511310322]
  We study theoretically the second-order correlation function $g(2)(t)$ for photons transmitted through a periodic Bragg-spaced array of superconducting qubits, coupled to a waveguide. We demonstrate that photon bunching and anti-bunching persist much longer than both radiative and non-radiative lifetimes of a single qubit.
  arXiv  Detail & Related papers  (2020-09-29T14:37:04Z)
• Hyperentanglement in structured quantum light [50.591267188664666]
  Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes. We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
  arXiv  Detail & Related papers  (2020-06-02T18:00:04Z)
• Increasing two-photon entangled dimensions by shaping input beam profiles [6.031707038309234]
  We show a simple method to generate a larger spiral bandwidth of entangled photon pairs. By investigating both experimentally and theoretically, we have found that an exponential pump profile that is roughly the inverse of the mode profiles of the single-mode fibers used for OAM detection will provide a much larger SB.
  arXiv  Detail & Related papers  (2020-01-14T11:26:52Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.