Quantum-enhanced sensing via spectral noise reduction

• URL: http://arxiv.org/abs/2602.16350v1
• Date: Wed, 18 Feb 2026 10:33:40 GMT
• Title: Quantum-enhanced sensing via spectral noise reduction
• Authors: Romain Dalidet, Sébastien Tanzilli, Audrey Dot, Inès Ghorbel, Loïc Morvan, Laurent Labonté, Anthony Martin,
• Abstract summary: We report a direct demonstration of quantum-enhanced sensing in the Fourier domain by comparing single- and two-photon interference in a fiber-based interferometer.<n>The simultaneous acquisition of both signals provides a common-mode reference that enables a fair and unambiguous benchmark of quantum advantage.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report a direct demonstration of quantum-enhanced sensing in the Fourier domain by comparing single- and two-photon interference in a fiber-based interferometer under strictly identical noise conditions. The simultaneous acquisition of both signals provides a common-mode reference that enables a fair and unambiguous benchmark of quantum advantage. Spectral analysis of the interferometric outputs reveals that quantum correlations do not increase the amplitude of the modulation peak, but instead lower the associated noise floor, resulting in the expected 3 dB improvement in signal-to-noise ratio. This enhancement persists in the sub-shot-noise regime, where the classical signal becomes buried in the spectral background while the two-photon contribution remains resolvable. These observations establish Fourier-domain quantum super-sensitivity as an operational and broadly applicable resource for precision interferometric sensing.

Related papers

• Squeezing-Enhanced Two-Phase Estimation with N-Particle W-type States [11.248437993511393]
  We investigate the simultaneous estimation of two optical phases in a three-mode interferometer assisted by optical parametric amplification (OPA)<n>We show that uniformly applied OPA significantly enhances the attainable precision beyond that of an unamplified interferometer.<n>Although loss degrades the achievable precision, the OPA-assisted scheme retains a clear advantage for moderate loss, indicating a degree of robustness against dissipation.
  arXiv  Detail & Related papers  (2026-01-09T07:30:39Z)
• Tunable multi-photon correlations from a coherently driven quantum dot [0.06990756918994177]
  Mixing the fields generated by different light sources has emerged as a powerful approach for engineering non-Gaussian quantum states.<n>We investigate intensity correlation functions arising from the interference of resonance fluorescence from a quantum emitter with a coherent laser field.<n>We show that the observed bunching behavior results from a subtle interplay between quantum interference and the normalization of the correlation functions.
  arXiv  Detail & Related papers  (2025-10-13T08:51:01Z)
• Quantum enhanced balanced heterodyne readout for differential interferometry [0.0]
  We experimentally demonstrate quantum-enhanced heterodyne readout of two spatially distinct interferometers with direct optical signal combination. Applying a high-frequency, spectrally entangled, two-mode squeezed state, we show further signal-to-noise improvement of an injected audio band signal of 3.5 dB.
  arXiv  Detail & Related papers  (2024-01-10T05:35:43Z)
• 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)
• Entanglement-enhanced dual-comb spectroscopy [0.7340017786387767]
  Dual-comb interferometry harnesses the interference of two laser frequency combs to provide unprecedented capability in spectroscopy applications. We propose an entanglement-enhanced dual-comb spectroscopy protocol that leverages quantum resources to significantly improve the signal-to-noise ratio performance. Our results show significant quantum advantages in the uW to mW power range, making this technique particularly attractive for biological and chemical sensing applications.
  arXiv  Detail & Related papers  (2023-04-04T03:57:53Z)
• Controlling Frequency-Domain Hong-Ou-Mandel Interference via Electromagnetically Induced Transparency [5.467400475482669]
  Hong-Ou-Mandel (HOM) interference is a compelling quantum phenomenon that demonstrates the nonclassical nature of single photons. In this study, we investigate an electromagnetically induced transparency-based double-$Lambda$ four-wave mixing system.
  arXiv  Detail & Related papers  (2023-02-14T08:22:09Z)
• Autonomous coherence protection of a two-level system in a fluctuating environment [68.8204255655161]
  We re-examine a scheme originally intended to remove the effects of static Doppler broadening from an ensemble of non-interacting two-level systems (qubits) We demonstrate that this scheme is far more powerful and can also protect a single (or even an ensemble) qubit's energy levels from noise which depends on both time and space.
  arXiv  Detail & Related papers  (2023-02-08T01:44:30Z)
• 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)
• 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)
• Enhancing nonclassical bosonic correlations in a Quantum Walk network through experimental control of disorder [50.591267188664666]
  We experimentally realize a controllable inhomogenous Quantum Walk dynamics. We observe two photon states which exhibit an enhancement in the quantum correlations between two modes of the network.
  arXiv  Detail & Related papers  (2021-02-09T10:57:00Z)
• 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.