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Quantum control of Hubbard excitons.

Denitsa R Baykusheva1,2, Deven Carmichael3, Clara S Weber4,5

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Researchers achieved quantum control of a strongly correlated Hubbard exciton in Sr2CuO3 using Floquet engineering. This method manipulates many-body wavefunctions, advancing quantum control for materials science and quantum sensing applications.

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Area of Science:

  • Quantum materials science
  • Condensed matter physics
  • Quantum optics

Background:

  • Quantum control of many-body wavefunctions is crucial for manipulating emergent phenomena in quantum materials.
  • Floquet engineering, using periodic optical fields, is a key strategy for quantum control.
  • Previous applications focused on weakly interacting systems, leaving many-body wavefunctions largely unexplored.

Purpose of the Study:

  • To achieve quantum control of a strongly correlated Hubbard exciton in a one-dimensional Mott insulator.
  • To explore the manipulation of many-body wavefunctions using Floquet engineering.
  • To advance programmable control of correlated states and exciton-based quantum sensing.

Main Methods:

  • Utilizing Floquet engineering with a non-resonant mid-infrared optical field.
  • Coherently dressing the exciton wavefunction to drive rotations between bright and dark states.
  • Employing resonant third-harmonic generation to quantify ultrafast rotations.

Main Results:

  • Demonstrated quantum control over a strongly correlated Hubbard exciton in Sr2CuO3.
  • Achieved coherent manipulation of the exciton wavefunction using Floquet engineering.
  • Quantified ultrafast π/2 rotations on the Bloch sphere.

Conclusions:

  • Floquet engineering enables quantum control of strongly correlated many-body wavefunctions.
  • This research opens new avenues for programmable quantum control in materials.
  • The findings support the development of advanced exciton-based quantum sensing technologies.