Certifying spatial entanglement between non-degenerate photon pairs with a camera

• URL: http://arxiv.org/abs/2506.14300v1
• Date: Tue, 17 Jun 2025 08:24:34 GMT
• Title: Certifying spatial entanglement between non-degenerate photon pairs with a camera
• Authors: Emma Brambila, Raphael Guitter, René Sondenheimer, Markus Gräfe, Hugo Defienne,
• Abstract summary: We investigate transverse spatial entanglement between photon pairs of different wavelengths using a camera-based coincidence technique.<n>We certify the presence of entanglement between the pairs through violation of an Einstein-Podolsky-Rosen criterion.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate transverse spatial entanglement between photon pairs of different wavelengths using a camera-based coincidence technique. By adapting the correlation measurements to the photons frequencies, we certify the presence of entanglement between the pairs through violation of an Einstein-Podolsky-Rosen criterion. Additionally, we examine how parameters such as pump waist and crystal length influence these correlations. Our results highlight key differences from the frequency-degenerate case, showing that an adapted theoretical analysis is essential to avoid significant misestimations and to reliably certify entanglement.

Related papers

• Demonstration of Lossy Linear Transformations and Two-Photon Interference on a Photonic Chip [78.1768579844556]
  We show that engineered loss, using an auxiliary waveguide, allows one to invert the spatial statistics from bunching to antibunching. We study the photon statistics within the loss-emulating channel and observe photon coincidences, which may provide insights into the design of quantum photonic integrated chips.
  arXiv  Detail & Related papers  (2024-04-09T06:45:46Z)
• Wave-particle correlations in multiphoton resonances of coherent light-matter interaction [0.0]
  We discuss the conditional measurement of field amplitudes by a nonclassical photon sequence in the Jaynes-Cummings (JC) model under multiphoton operation.
  arXiv  Detail & Related papers  (2024-02-14T16:51:54Z)
• Experimental analysis on image resolution of quantum imaging with undetected light through position correlations [0.0]
  We experimentally analyse how the crystal length and pump waist affect the image resolution. We probe the resolution of our quantum imaging scheme for varying pump waists over one order of magnitude.
  arXiv  Detail & Related papers  (2023-06-02T19:29:15Z)
• Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
  Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
  arXiv  Detail & Related papers  (2021-07-23T07:30:57Z)
• Distinguishability and "which pathway" information in multidimensional interferometric spectroscopy with a single entangled photon-pair [0.0]
  Photon exchange-phase and degree of distinguishability have not been widely utilized in quantum-enhanced applications. We show that even at low degree entanglement, when a two-photon wave-function is coupled to matter, it is encoded with a reliable "which pathway?" information. We find that quantum-light interferometry facilitates utterly different set of time-delay variables, which are unbound by uncertainty to the inverse bandwidth of the wave-packet.
  arXiv  Detail & Related papers  (2021-07-12T07:19:58Z)
• 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)
• Observations of near-perfect nonclassical correlation using coherent light [12.507208769851653]
  We show the physics of anticorrelation on a beam splitter using sub-Poisson distributed coherent photons. A particular phase relation between paired photons is unveiled for anticorrelation, satisfying the complementarity theory of quantum mechanics.
  arXiv  Detail & Related papers  (2021-05-05T04:27:51Z)
• Bandwidth control of the biphoton wavefunction exploiting spatio-temporal correlations [0.0]
  We study how the waists of the detection and pump beams impact on the spectral bandwidth of the photons. This allows for a simple experimental implementation to control the bandwidth of the biphoton spectra.
  arXiv  Detail & Related papers  (2021-04-28T13:30:00Z)
• Symmetry allows for distinguishability in totally destructive many-particle interference [52.77024349608834]
  We investigate, in a four photon interference experiment in a laser-written waveguide structure, how symmetries control the suppression of many-body output events of a $J_x$ unitary. We show that totally destructive interference does not require mutual indistinguishability between all, but only between symmetrically paired particles.
  arXiv  Detail & Related papers  (2021-02-19T16:37:19Z)
• Auto-heterodyne characterization of narrow-band photon pairs [68.8204255655161]
  We describe a technique to measure photon pair joint spectra by detecting the time-correlation beat note when non-degenerate photon pairs interfere at a beamsplitter. The technique is well suited to characterize pairs of photons, each of which can interact with a single atomic species.
  arXiv  Detail & Related papers  (2021-01-08T18:21:30Z)
• Frequency-resolved photon correlations in cavity optomechanics [58.720142291102135]
  We analyze the frequency-resolved correlations of the photons being emitted from an optomechanical system. We discuss how the time-delayed correlations can reveal information about the dynamics of the system. This enriched understanding of the system can trigger new experiments to probe nonlinear phenomena in optomechanics.
  arXiv  Detail & Related papers  (2020-09-14T06:17:36Z)

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.