---
_id: '62859'
abstract:
- lang: eng
  text: <jats:p>Frequency-filtered photon correlations have been proven to be extremely
    useful in grasping how the detection process alters photon statistics. Harnessing
    the spectral correlations also permits refinement of the emission and unraveling
    of previously hidden strong correlations in a plethora of quantum-optical systems
    under continuous-wave excitation. In this work, we investigate such correlations
    for time-dependent excitation and develop a methodology to compute efficiently
    time-integrated correlations, which are at the heart of the photon-counting theory,
    and subsequently apply it to analyze the photon emission of pulsed systems. By
    combining this formalism with the —which facilitates frequency-resolved correlations—we
    demonstrate how spectral filtering enhances single-photon purity and suppresses
    multiphoton noise in time-bin-encoded quantum states. Specifically, filtering
    the central spectral peak of a dynamically driven two-level system boosts temporal
    coherence and improves the fidelity of time-bin entanglement preparation, even
    under conditions favoring multiphoton emission. These results establish spectral
    filtering as a critical tool for tailoring photon statistics in pulsed quantum
    light sources.</jats:p>
article_number: '033296'
author:
- first_name: Santiago
  full_name: Bermúdez-Feijóo, Santiago
  last_name: Bermúdez-Feijóo
- first_name: Eduardo
  full_name: Zubizarreta Casalengua, Eduardo
  last_name: Zubizarreta Casalengua
- first_name: Kai
  full_name: Müller, Kai
  last_name: Müller
- first_name: Klaus
  full_name: Jöns, Klaus
  id: '85353'
  last_name: Jöns
citation:
  ama: Bermúdez-Feijóo S, Zubizarreta Casalengua E, Müller K, Jöns K. Spectral correlations
    of dynamical resonance fluorescence. <i>Physical Review Research</i>. 2025;7(3).
    doi:<a href="https://doi.org/10.1103/jmy9-bd3l">10.1103/jmy9-bd3l</a>
  apa: Bermúdez-Feijóo, S., Zubizarreta Casalengua, E., Müller, K., &#38; Jöns, K.
    (2025). Spectral correlations of dynamical resonance fluorescence. <i>Physical
    Review Research</i>, <i>7</i>(3), Article 033296. <a href="https://doi.org/10.1103/jmy9-bd3l">https://doi.org/10.1103/jmy9-bd3l</a>
  bibtex: '@article{Bermúdez-Feijóo_Zubizarreta Casalengua_Müller_Jöns_2025, title={Spectral
    correlations of dynamical resonance fluorescence}, volume={7}, DOI={<a href="https://doi.org/10.1103/jmy9-bd3l">10.1103/jmy9-bd3l</a>},
    number={3033296}, journal={Physical Review Research}, publisher={American Physical
    Society (APS)}, author={Bermúdez-Feijóo, Santiago and Zubizarreta Casalengua,
    Eduardo and Müller, Kai and Jöns, Klaus}, year={2025} }'
  chicago: Bermúdez-Feijóo, Santiago, Eduardo Zubizarreta Casalengua, Kai Müller,
    and Klaus Jöns. “Spectral Correlations of Dynamical Resonance Fluorescence.” <i>Physical
    Review Research</i> 7, no. 3 (2025). <a href="https://doi.org/10.1103/jmy9-bd3l">https://doi.org/10.1103/jmy9-bd3l</a>.
  ieee: 'S. Bermúdez-Feijóo, E. Zubizarreta Casalengua, K. Müller, and K. Jöns, “Spectral
    correlations of dynamical resonance fluorescence,” <i>Physical Review Research</i>,
    vol. 7, no. 3, Art. no. 033296, 2025, doi: <a href="https://doi.org/10.1103/jmy9-bd3l">10.1103/jmy9-bd3l</a>.'
  mla: Bermúdez-Feijóo, Santiago, et al. “Spectral Correlations of Dynamical Resonance
    Fluorescence.” <i>Physical Review Research</i>, vol. 7, no. 3, 033296, American
    Physical Society (APS), 2025, doi:<a href="https://doi.org/10.1103/jmy9-bd3l">10.1103/jmy9-bd3l</a>.
  short: S. Bermúdez-Feijóo, E. Zubizarreta Casalengua, K. Müller, K. Jöns, Physical
    Review Research 7 (2025).
date_created: 2025-12-04T12:19:04Z
date_updated: 2025-12-11T12:52:24Z
department:
- _id: '623'
- _id: '15'
- _id: '429'
- _id: '642'
doi: 10.1103/jmy9-bd3l
intvolume: '         7'
issue: '3'
language:
- iso: eng
publication: Physical Review Research
publication_identifier:
  issn:
  - 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Spectral correlations of dynamical resonance fluorescence
type: journal_article
user_id: '48188'
volume: 7
year: '2025'
...