High-dimensional Angular Two-Photon Interference and Angular Qudit States

• URL: http://arxiv.org/abs/2002.10513v1
• Date: Mon, 24 Feb 2020 20:06:45 GMT
• Title: High-dimensional Angular Two-Photon Interference and Angular Qudit States
• Authors: Graciana Puentes
• Abstract summary: We propose an experiment to generate maximally entangled states of $D$-dimensional quantum systems by exploiting correlations of parametric down-converted photons. The entanglement of the qudit state can be quantified in terms of the Concurrence, which can be expressed in terms of the visibility of the interference fringes.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Using angular position-orbital angular momentum entangled photons, we propose an experiment to generate maximally entangled states of $D$-dimensional quantum systems, the so called qudits, by exploiting correlations of parametric down-converted photons. Angular diffraction masks containing $N$-slits in the arms of each twin photon define a qudit space of dimension $N^2$, spanned by the alternative pathways of the photons. Due to phase-matching conditions, the twin photons will pass only by symmetrically opposite angular slits, generating maximally entangled states between these different paths, which can be detected by high-order two-photon interference fringes via coincidence counts. Numerical results for $N$ angular slits with $N = 2, 4, 5, 6, 10$ are reported, corresponding to qudit Hilbert spaces of dimension $D=N^2=4,16,25, 36,100$, respectively. We discuss relevant experimental parameters for an experimental implementation of the proposed scheme using Spatial Light Modulators (SLMs), and twin-photons produced by Spontaneouos Parametric Down Conversion (SPDC). The entanglement of the qudit state can be quantified in terms of the Concurrence, which can be expressed in terms of the visibility of the interference fringes, or by using Entanglement Witnesses. These results provide an additional means for preparing entangled quantum states in high-dimensions, a fundamental resource for quantum simulation and quantum information protocols.

Related papers

• Multiphoton Correlations between Quantum Images [0.8701566919381222]
  Experimental demonstrations of entangled quantum images produced through parametric downconversion have so far been confined to studying two photon correlations. Here we show that multiphoton correlations between quantum images are accessible experimentally and exhibit many new features including being sensitive to the phase of the bi-photon wavefunction.
  arXiv  Detail & Related papers  (2022-11-16T05:07:52Z)
• Orbital angular momentum based intra- and inter- particle entangled states generated via a quantum dot source [0.0]
  This work employs a bright QD single-photon source to generate a complete set of quantum states for information processing with OAM photons. We first study the hybrid intra-particle entanglement between the OAM and the polarization degree of freedom of a single-photon. Then, we investigate the hybrid inter-particle entanglement, by exploiting a probabilistic two qudit OAM-based entangling gate.
  arXiv  Detail & Related papers  (2022-11-09T19:20:49Z)
• 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)
• High-Dimensional Entanglement of Photonic Angular Qudits [0.0]
  We propose a method for generation of entangled photonic states in high dimensions, the so-called qudits. Diffraction masks containing $N$ angular slits placed in the path of twin photons define a qudit space of dimension $N2$, spanned by alternative pathways of OAM-entangled photons. We quantify the high-dimensional entanglement of path-entangled photons by the Concurrence, using an analytic expression valid for pure states.
  arXiv  Detail & Related papers  (2021-10-14T07:14:03Z)
• Two-photon resonance fluorescence of two interacting non-identical quantum emitters [77.34726150561087]
  We study a system of two interacting, non-indentical quantum emitters driven by a coherent field. We show that the features imprinted by the two-photon dynamics into the spectrum of resonance fluorescence are particularly sensitive to changes in the distance between emitters. This can be exploited for applications such as superresolution imaging of point-like sources.
  arXiv  Detail & Related papers  (2021-06-04T16:13:01Z)
• Generation of High-Order Vortex States from Two-Mode Squeezed States [0.0]
  Scheme for generation of high-order vortex states using two-mode photon-number squeezed states. Potential to improve measurement sensitivity beyond the Standard Quantum Limit.
  arXiv  Detail & Related papers  (2021-04-05T15:39:12Z)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• 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)
• Determination of spatial quantum states by using Point Diffraction Interferometry [0.0]
  We present a method to reconstruct pure spatial qudits of arbitrary dimension $d$ based on a point diffraction interferometer. In the proposed scheme, the quantum states are codified in the discretized transverse position of a photon field, once they are sent through an aperture with $d$ slits. To characterize these photonic quantum states, the complete phase wavefront is reconstructed through a phase-shifting technique.
  arXiv  Detail & Related papers  (2020-05-20T11:10:59Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)
• Quantum-Clustered Two-Photon Walks [68.8204255655161]
  We demonstrate a previously unknown two-photon effect in a discrete-time quantum walk. Two identical bosons with no mutual interactions can remain clustered together. The two photons move in the same direction at each step due to a two-photon quantum interference phenomenon.
  arXiv  Detail & Related papers  (2020-03-12T17:02:35Z)

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.