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Witnessing light-driven entanglement using time-resolved resonant inelastic X-ray scattering

Author

Listed:
  • Jordyn Hales

    (Clemson University)

  • Utkarsh Bajpai

    (Clemson University)

  • Tongtong Liu

    (Massachusetts Institute of Technology)

  • Denitsa R. Baykusheva

    (Harvard University)

  • Mingda Li

    (Massachusetts Institute of Technology)

  • Matteo Mitrano

    (Harvard University)

  • Yao Wang

    (Clemson University)

Abstract

Characterizing and controlling entanglement in quantum materials is crucial for the development of next-generation quantum technologies. However, defining a quantifiable figure of merit for entanglement in macroscopic solids is theoretically and experimentally challenging. At equilibrium the presence of entanglement can be diagnosed by extracting entanglement witnesses from spectroscopic observables and a nonequilibrium extension of this method could lead to the discovery of novel dynamical phenomena. Here, we propose a systematic approach to quantify the time-dependent quantum Fisher information and entanglement depth of transient states of quantum materials with time-resolved resonant inelastic x-ray scattering. Using a quarter-filled extended Hubbard model as an example, we benchmark the efficiency of this approach and predict a light-enhanced many-body entanglement due to the proximity to a phase boundary. Our work sets the stage for experimentally witnessing and controlling entanglement in light-driven quantum materials via ultrafast spectroscopic measurements.

Suggested Citation

  • Jordyn Hales & Utkarsh Bajpai & Tongtong Liu & Denitsa R. Baykusheva & Mingda Li & Matteo Mitrano & Yao Wang, 2023. "Witnessing light-driven entanglement using time-resolved resonant inelastic X-ray scattering," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38540-3
    DOI: 10.1038/s41467-023-38540-3
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