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

Hales, Jordyn; Bajpai, Utkarsh; Liu, Tongtong; Baykusheva, Denitsa R.; Li, Mingda; Mitrano, Matteo; Wang, Yao

doi:10.1038/s41467-023-38540-3

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

Journal Article · 13 June 2023 · Nature Communications

DOI: https://doi.org/10.1038/s41467-023-38540-3 · OSTI ID:1985175

Hales, Jordyn; Bajpai, Utkarsh; Liu, Tongtong;

;

; Mitrano, Matteo;

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.

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Research Organization:: Clemson University, SC (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-05CH11231; SC0020148; SC0022874; SC0022883

OSTI ID:: 1985175

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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