Momentum-resolved Hong-Ou-Mandel interference of weak coherent states

• URL: http://arxiv.org/abs/2508.19978v1
• Date: Wed, 27 Aug 2025 15:37:20 GMT
• Title: Momentum-resolved Hong-Ou-Mandel interference of weak coherent states
• Authors: Fabrizio Sgobba, Francesco Di Lena, Danilo Triggiani, Deborah Katia Pallotti, Cosmo Lupo, Piergiorgio Daniele, Gennaro Fratta, Giulia Acconcia, Ivan Rech, Luigi Santamaria Amato,
• Abstract summary: We demonstrate an experimental scheme for high-precision position measurements based on two-photon interferometry with independent photons and SPAD arrays.<n>Our scheme extends the operative range of Hong-Ou-Mandel interferometry beyond its intrinsic constraints due to photons indistinguishability.<n>We show that partial photon distinguishability and entanglement impurity are not necessarily a nuisance in a technique that relies on two-photon interference.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We demonstrate an experimental scheme for high-precision position measurements based on transverse-momentum-resolved two-photon interferometry with independent photons and SPAD arrays. Our scheme extends the operative range of Hong-Ou-Mandel interferometry beyond its intrinsic constraints due to photons indistinguishability, paving the way to applications in high-resolution imaging. We assess the experimental results against the ultimate precision bounds as determined by quantum estimation theory. Our experiment ultimately proves that transverse-momentum resolved measurements of fourth-order correlations in the fields can be employed to overcome spatial distiguishability between independent photons. The relevance of our results extends beyond sensing and imaging towards quantum information processing, as we show that partial photon distinguishability and entanglement impurity are not necessarily a nuisance in a technique that relies on two-photon interference.

Related papers

• Verification of continuous variable entanglement with undetected photons [0.0]
  We verify transverse spatial entanglement of photon-pairs generated in spontaneous parametric down conversion.<n>We experimentally demonstrate the violation of the Einstein-Podolsky-Rosen criterion and of the Mancini-Giovannetti-Vitali-Tombesi criterion.
  arXiv  Detail & Related papers  (2026-01-13T09:22:47Z)
• Quantum Interference of Distinguishable Photons Based on Spatially-Resolved Measurements [67.410870290301]
  We present experimental results demonstrating the quantum interference of two photons distinguishable in their transverse momenta.<n>We contrast our results with a non-spatially resolved measurement where averaging over the photons' positions washes out the quantum interference observed in spatially resolved measurements.
  arXiv  Detail & Related papers  (2025-08-20T16:56:59Z)
• Ultrasensitive Transverse Deflection Measurement with Two-photon Interference [8.406719933893529]
  Hong-Ou-Mandel (HOM) interference is intrinsic quantum phenomena that goes beyond the possibilities of classical physics.<n>We present an experimental demonstration of a spatial HOM interferometry for measuring the transverse deflection of an optical beam.
  arXiv  Detail & Related papers  (2025-04-06T07:52:43Z)
• Two-photon interference between mutually-detuned resonance fluorescence signals scattered off a semiconductor quantum dot [8.451939626098337]
  Post-selective two-photon interference experiments between mutually-detuned resonance fluorescence signals from an InAs quantum dot embedded in a micropillar cavity.<n>Results suggest that indistinguishability among photons scattered off a quantum dot is inherently insensitive to the driving laser's detuning.
  arXiv  Detail & Related papers  (2025-01-28T13:32:26Z)
• Superresolution imaging of two incoherent sources via two-photon interference sampling measurements in the transverse momenta [0.0]
  We demonstrate the emergence of two-photon beats from the interference of a single reference photon and a photon coming from one of two thermal sources.<n>The ultimate quantum precision in the estimation of any value of the distance between two thermal sources is achievable independently of the wavepacket spatial structure.<n>This technique makes it an optimal candidate to important applications in microscopy, astronomy and remote sensing.
  arXiv  Detail & Related papers  (2024-12-13T11:41:59Z)
• 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)
• Estimation with ultimate quantum precision of the transverse displacement between two photons via two-photon interference sampling measurements [0.0]
  We present a quantum sensing scheme achieving the ultimate quantum sensitivity in the estimation of the transverse displacement between two photons interfering at a balanced beam splitter. This scheme can possibly lead to enhanced high-precision nanoscopic techniques, such as super-resolved single-molecule localization microscopy with quantum dots.
  arXiv  Detail & Related papers  (2023-09-13T11:18:00Z)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• 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)
• Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
  Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
  arXiv  Detail & Related papers  (2021-05-12T06:47:35Z)
• 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)

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.