Frequency-bin interferometry for reconstructing electric fields with low intensity

• URL: http://arxiv.org/abs/2504.08607v1
• Date: Fri, 11 Apr 2025 15:14:26 GMT
• Title: Frequency-bin interferometry for reconstructing electric fields with low intensity
• Authors: Abhinandan Bhattacharjee, Laura Serino, Patrick Folge, Benjamin Brecht, Christine Silberhorn,
• Abstract summary: We introduce frequency-bin interferometry for reconstructing electric fields with low intensity.<n>This technique provides spectral amplitude, phase, and coherence profiles of single-photon pulses without requiring intensive reconstruction algorithms.<n>We demonstrate its compatibility with quantum light by characterizing partially coherent pulses generated by a type-0 down-conversion process.
• Score: 2.4021825107306465
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Ultrafast single-photon pulses with tailored time-frequency properties are highly attractive for quantum information science, offering high-dimensional encoding and compatibility with integrated optics platforms. However, accurate characterization of such pulses, including spectral coherence, remains challenging because current methods require substantial experimental resources and complex reconstruction algorithms. Here, we introduce frequency-bin interferometry for reconstructing electric fields with low intensity (FIREFLY), a technique that directly provides spectral amplitude, phase, and coherence profiles of single-photon pulses without requiring intensive reconstruction algorithms. Our approach measures the two-point spectral correlation function of the pulse by interfering its different frequency components using a quantum pulse gate (QPG) driven by a reference pump pulse. We demonstrate its compatibility with quantum light by characterizing partially coherent pulses generated by a type-0 parametric down-conversion process. We also overcome this requirement of a known pump pulse by introducing spectral shear into our interferometric scheme using a multi-output QPG (mQPG). This enables simultaneous characterization of a single-photon-level input pulse alongside an unknown pump pulse. Notably, our method achieves theory-experiment similarity above 95\% across all retrieved profiles, which demonstrates the reliability of this scheme for quantum information applications based on time-frequency encodings.

Related papers

• Spectral correlations of dynamical Resonance Fluorescence [0.0]
  We show how spectral filtering enhances single-photon purity and suppresses multi-photon noise in time-bin-encoded quantum states.<n>These results establish spectral filtering as a critical tool for tailoring photon statistics in pulsed quantum light sources.
  arXiv  Detail & Related papers  (2025-04-07T16:27:13Z)
• Pulse characterization at the single-photon level through chronocyclic $Q$-function measurements [2.193021519015704]
  We demonstrate the retrieval of the complex spectral amplitude of single-photon-level light pulses through measuring their chronocyclic $Q-$function. Our approach draws inspiration from quantum state tomography by exploiting the analogy between quadrature phase space and time-frequency phase space.
  arXiv  Detail & Related papers  (2024-08-22T11:30:49Z)
• 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)
• Digital noise spectroscopy with a quantum sensor [57.53000001488777]
  We introduce and experimentally demonstrate a quantum sensing protocol to sample and reconstruct the auto-correlation of a noise process. Walsh noise spectroscopy method exploits simple sequences of spin-flip pulses to generate a complete basis of digital filters. We experimentally reconstruct the auto-correlation function of the effective magnetic field produced by the nuclear-spin bath on the electronic spin of a single nitrogen-vacancy center in diamond.
  arXiv  Detail & Related papers  (2022-12-19T02:19:35Z)
• Phase Randomness in a Semiconductor Laser: the Issue of Quantum Random Number Generation [83.48996461770017]
  This paper describes theoretical and experimental methods for estimating the degree of phase randomization in a gain-switched laser. We show that the interference signal remains quantum in nature even in the presence of classical phase drift in the interferometer.
  arXiv  Detail & Related papers  (2022-09-20T14:07:39Z)
• Enhancing strontium clock atom interferometry using quantum optimal control [0.09786690381850353]
  We study QOC pulses for strontium clock interferometry and demonstrate their advantage over basic square pulses. This could improve the scale of large momentum transfer in Sr clock interferometers, paving the way to achieve scientific goals.
  arXiv  Detail & Related papers  (2022-07-26T23:56:33Z)
• Heisenberg treatment of multiphoton pulses in waveguide QED with time-delayed feedback [62.997667081978825]
  We propose a projection onto a complete set of states in the Hilbert space to decompose the multi-time correlations into single-time matrix elements. We consider the paradigmatic example of a two-level system that couples to a semi-infinite waveguide and interacts with quantum light pulses.
  arXiv  Detail & Related papers  (2021-11-04T12:29:25Z)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)
• 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)
• Quantum Enhanced Measurement of an Optical Frequency Comb [0.0]
  Measuring the spectral properties of an optical frequency comb is among the most fundamental tasks of precision metrology. We demonstrate here single shot multi parameter estimation at and beyond the standard quantum limit. Using a quantum frequency comb that consists of multiple squeezed states in a family of Hermite-Gaussian spectral/temporal modes, the signal-to-noise ratios of the mean energy and the central frequency measurements surpass the shot-noise limit by around 19% and 15%, respectively.
  arXiv  Detail & Related papers  (2020-03-12T14:59:27Z)

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.