@article{21726,
  abstract     = {Quantum control of the many-body wavefunction is a central challenge in quantum materials research, as it could yield a precise control knob to manipulate emergent phenomena. Floquet engineering, the coherent dressing of quantum states with periodic non-resonant optical fields, has become an important strategy for quantum control. Most applications to solid-state systems have targeted weakly interacting or single-ion states, leaving the manipulation of many-body wavefunctions largely unexplored. Here we use Floquet engineering to achieve quantum control of a strongly correlated Hubbard exciton in the one-dimensional Mott insulator Sr2CuO3. A non-resonant mid-infrared optical field coherently dresses the exciton wavefunction, driving its rotation between bright and dark states. We use resonant third-harmonic generation to quantify ultrafast π/2 rotations on the Bloch sphere spanned by these exciton states. Our work advances the quest towards programmable control of correlated states and exciton-based quantum sensing.},
  author       = {Baykusheva, Denitsa Rangelova and Carmichael, Deven and Weber, Clara S. and Lu, I. Te and Glerean, Filippo and Meng, Tepie and De Oliveira, Pedro B.M. and Homes, Christopher C. and Zaliznyak, Igor A. and Gu, G. D. and Dean, Mark P.M. and Rubio, Angel and Kennes, Dante M. and Claassen, Martin and Mitrano, Matteo},
  issn         = {1476-4660},
  journal      = {Nature Materials},
  publisher    = {Springer Nature},
  title        = {{Quantum control of Hubbard excitons}},
  doi          = {10.1038/s41563-026-02517-6},
  year         = {2026},
}

@article{19639,
  abstract     = {Magnetic interactions are thought to play a key role in the properties of many unconventional superconductors, including cuprates, iron pnictides, and square-planar nickelates. Superconductivity was also recently observed in the bilayer and trilayer Ruddlesden-Popper nickelates, the electronic structure of which is expected to differ from that of cuprates and square-planar nickelates. Here we study how electronic structure and magnetic interactions evolve with the number of layers, 𝑛, in thin film Ruddlesden-Popper nickelates Nd𝑛+1⁢Ni𝑛⁢O3⁢𝑛+1 with 𝑛=1,3, and 5 using resonant inelastic x-ray scattering (RIXS). The RIXS spectra are consistent with a high-spin |3⁢𝑑8⁢ 𝐿̲⟩ electronic configuration, resembling that of La2−𝑥⁢Sr𝑥⁢NiO4 and the parent perovskite, NdNiO3. The magnetic excitations soften to lower energy in the structurally self-doped, higher-𝑛 films. Our observations confirm that structural tuning is an effective route for altering electronic properties, such as magnetic superexchange, in this prominent family of materials.},
  author       = {Tenhuisen, Sophia F.R. and Pan, Grace A. and Song, Qi and Baykusheva, Denitsa Rangelova and Ferenc Segedin, Dan and Goodge, Berit H. and Paik, Hanjong and Pelliciari, Jonathan and Bisogni, Valentina and Gu, Yanhong and Agrestini, Stefano and Nag, Abhishek and García-Fernández, Mirian and Zhou, Ke Jin and Kourkoutis, Lena F. and Brooks, Charles M. and Mundy, Julia A. and Dean, Mark P.M. and Mitrano, Matteo},
  issn         = {2469-9969},
  journal      = {Physical Review B},
  number       = {16},
  publisher    = {American Physical Society},
  title        = {{Magnetic excitations in Ndn+1Nin O3n+1 Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering}},
  doi          = {10.1103/PhysRevB.111.165145},
  volume       = {111},
  year         = {2025},
}

@article{18919,
  abstract     = {The integration of theory and experiment makes possible tracking the slow evolution of a photodoped Mott insulator to a distinct non-equilibrium metallic phase under the influence of electron-lattice coupling.},
  author       = {Baykusheva, Denitsa Rangelova},
  issn         = {1745-2481},
  journal      = {Nature Physics},
  number       = {5},
  pages        = {684--685},
  publisher    = {Springer Nature},
  title        = {{Through the slopes of a light-induced phase transition}},
  doi          = {10.1038/s41567-024-02401-7},
  volume       = {20},
  year         = {2024},
}