Ultrafast pump-probe phase-randomized tomography

Filippo Glerean; Enrico Maria Rigoni; Giacomo Jarc; Shahla Yasmin Mathengattil; Angela Montanaro; Francesca Giusti; Matteo Mitrano; Fabio Benatti; Daniele Fausti

doi:10.1038/s41377-025-01789-y

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Ultrafast pump-probe phase-randomized tomography

Original Articles

- Ultrafast pump-probe phase-randomized tomography
- Light: Science & Applications Vol. 14, Issue 4, Pages: 1135-1142(2025)
- Affiliations：
  
  1.Dipartimento di Fisica, Università degli Studi di Trieste, Trieste, Italy
  2.Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  3.Department of Physics, Harvard University, Cambridge, MA, USA
  4.Department of Physics, University of Erlangen-Nürnberg, Erlangen, Germany
  5.Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Trieste, Italy
- Author bio：
  
  Daniele Fausti (daniele.fausti@fau.de)
- Funds：
- DOI：10.1038/s41377-025-01789-y
  CLC：
- Received：18 August 2024，
  
  Revised：24 January 2025，
  
  Accepted：2025-02-13，
  
  Published Online：06 March 2025，
  
  Published：30 April 2025
- Accepted：
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Glerean, F. et al. Ultrafast pump-probe phase-randomized tomography. Light: Science & Applications, 14, 1135-1142 (2025).
DOI：

Glerean, F. et al. Ultrafast pump-probe phase-randomized tomography. Light: Science & Applications, 14, 1135-1142 (2025). DOI： 10.1038/s41377-025-01789-y.

摘要

Abstract

Measuring fluctuations in matter's low-energy excitations is the key to unveiling the nature of the non-equilibrium response of materials. A promising outlook in this respect is offered by spectroscopic methods that address matter fluctuations by exploiting the statistical nature of light-matter interactions with weak few-photon probes. Here we report the first implementation of ultrafast phase randomized tomography

combining pump-probe experiments with quantum optical state tomography

to measure the ultrafast non-equilibrium dynamics in complex materials. Our approach utilizes a time-resolved multimode heterodyne detection scheme with phase-randomized coherent ultrashort laser pulses

overcoming the limitations of phase-stable configurations and enabling a robust reconstruction of the statistical distribution of phase-averaged optical observables. This methodology is validated by measuring the coherent phonon response in α-quartz. By tracking the dynamics of the shot-noise limited photon number distribution of few-photon probes with ultrafast resolution

our results set an upper limit to the non-classical features of phononic state in α-quartz and provide a pathway to access non-equilibrium quantum fluctuations in more complex quantum materials.

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references

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