Time resolution at the quantum limit of two incoherent sources based on frequency resolved two-photon-interference

• URL: http://arxiv.org/abs/2602.08578v2
• Date: Tue, 10 Feb 2026 19:45:58 GMT
• Title: Time resolution at the quantum limit of two incoherent sources based on frequency resolved two-photon-interference
• Authors: Salvatore Muratore, Vincenzo Tamma,
• Abstract summary: We show the emergence of two-photon quantum beats in the frequency domain from the interference at a beam splitter of a photon emitted by a reference source.<n>The technique makes it applicable in astronomy, microscopy, remote clocks synchronization and radar ranging.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The Rayleigh criterion is a widely known limit in the resolution of incoherent sources with classical measurements in the spatial domain. Unsurprisingly the estimation of the time delay between two weak incoherent signals is afflicted by an analogue problem. In this work, we show the emergence of two-photon quantum beats in the frequency domain from the interference at a beam splitter of a photon emitted by a reference source and one from the two incoherent weak signals. We demonstrate, based on this phenomena, that with a relatively low number of measurements of the frequencies of the interfering photons either bunching or antibunching at the beam splitter output one can achieve a precision amounting to half of the quantum limit, independently of both the mode structure of the photonic wavepackets and the time delay to be estimated. The feasibility of the technique makes it applicable in astronomy, microscopy, remote clocks synchronization and radar ranging

Related papers

• Quantum-limited optical delay sensing across an enhanced dynamic range by frequency-resolving two-photon interference [33.9804677950531]
  Two-photon interference provides a powerful platform for precision metrology.<n>We sample the frequencies of two interfering photons, which extends the sensitivity in the time domain.<n>This enhances the dynamic range of optical delay estimation by up to twenty times compared to the non-resolved estimates.<n>This technique enables scan-free nanometre resolution depth sensing over a millimetre-scale range, with applications in biological and nanomaterial imaging.
  arXiv  Detail & Related papers  (2025-09-26T18:01:00Z)
• Demonstration of Fourier-domain Quantum Optical Coherence Tomography for a fast tomographic quantum imaging [0.9558392439655014]
  Quantum Optical Coherence Tomography (Q- OCT) outperforms classical OCT in several experimental terms.<n>We propose two joint spectrum pre-processing algorithms, aimed at compensating resolution-degrading effects within the setup.
  arXiv  Detail & Related papers  (2025-02-12T13:04:46Z)
• 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)
• Strong coupling between a single-photon and a two-photon Fock state [44.00303450801203]
  We report an experimental observation of the strong coupling between a single-photon and a two-photon Fock state in an ultrastrongly-coupled circuit-QED system.<n>Results represent a key step towards a new regime of quantum nonlinear optics.
  arXiv  Detail & Related papers  (2024-01-05T10:23:14Z)
• A Quantum Theory of Temporally Mismatched Homodyne Measurements with Applications to Optical Frequency Comb Metrology [39.58317527488534]
  We derive measurement operators for homodyne detection with arbitrary mode overlap. These operators establish a foundation to extend frequency-comb interferometry to a wide range of scenarios.
  arXiv  Detail & Related papers  (2023-10-05T22:49:50Z)
• 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)
• 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)
• Hong-Ou-Mandel interference of two independent continuous-wave coherent photons [0.23704813250344428]
  Hong-Ou-Mandel (HOM) interference with two independent continuous-wave coherent light sources are observed. To prepare highly indistinguishable photons from two independent laser sources, we employ high-precision frequency-stabilization techniques. An interference fringe involving two-photon beating is also observed when the frequency difference between the two interfering photons is beyond the spectral bandwidth of the individual coherent photons.
  arXiv  Detail & Related papers  (2021-06-04T12:07:56Z)
• Spectrally-resolved four-photon interference of time-frequency entangled photons [0.0]
  We analyze the behavior of phase-insensitive spectrally-resolved interferences arising from two pairs of time-frequency entangled photons. Our analysis is a thorough exploration of what can be achieved using time-frequency entanglement and spectrally-resolved Bell-state measurements.
  arXiv  Detail & Related papers  (2021-04-12T17:25:07Z)
• Tunable quantum interference using a topological source of indistinguishable photon pairs [0.0]
  We demonstrate the use of a two-dimensional array of ring resonators to generate indistinguishable photon pairs. We show that the linear dispersion of the edge states over a broad bandwidth allows us to tune the correlations. Our results pave the way for scalable and tunable sources of squeezed light.
  arXiv  Detail & Related papers  (2020-06-04T18:11:30Z)
• 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)
• Observing coherences with time-resolved photoemission [77.34726150561087]
  We discuss the potential creation and measurement of coherences in both dispersive solids and qubit-like single levels using current generation time- and angle-resolved photoemission technology. We show that in both cases, when both the pump and the probe overlap energetically with the coherent levels, that the time-resolved photoemission signal shows a beating pattern at the energy difference between the levels. In the case of dispersive bands, this leads to momentum-dependent oscillations, which may be used to map out small energy scales in the band structure.
  arXiv  Detail & Related papers  (2020-05-18T18:00:02Z)
• Frequency-Domain Quantum Interference with Correlated Photons from an Integrated Microresonator [96.25398432840109]
  We report frequency-domain Hong-Ou-Mandel interference with spectrally distinct photons generated from a chip-based microresonator. Our work establishes four-wave mixing as a tool for selective high-fidelity two-photon operations in the frequency domain.
  arXiv  Detail & Related papers  (2020-03-14T01:48:39Z)

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.