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Signatures of Quantum Coherences in Rydberg Excitons.

P Grünwald1, M Aßmann2, J Heckötter2

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This summary is machine-generated.

Quantum coherent effects emerge in semiconductor Rydberg excitons in bulk copper(II) oxide. This breakthrough enables low dephasing, paving the way for advanced quantum technologies in semiconductors.

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Area of Science:

  • Solid-state physics
  • Quantum optics
  • Materials science

Background:

  • Coherent optical control is established for atoms and quantum dots.
  • Semiconductor Rydberg excitons offer a novel platform for quantum phenomena.

Purpose of the Study:

  • To demonstrate quantum coherent effects in semiconductor Rydberg excitons.
  • To investigate the potential for coherently controlled quantum technologies in bulk Cu_{2}O.

Main Methods:

  • Utilizing a single-frequency laser to excite adjacent Rydberg exciton states in bulk Cu_{2}O.
  • Analyzing absorption spectra to identify emergent resonances and dressed states.
  • Measuring the level of pure dephasing in the system.

Main Results:

  • Observed emergence of quantum coherent effects in semiconductor Rydberg excitons.
  • Identified V-type three-level systems formed by coupled Rydberg exciton levels and the excitonic vacuum.
  • Demonstrated extremely low levels of pure dephasing in the studied system.

Conclusions:

  • The findings represent a significant advancement towards coherently controlled quantum technologies.
  • Semiconductor Rydberg excitons in bulk Cu_{2}O exhibit promising quantum coherent properties.
  • This work opens new avenues for developing quantum devices based on semiconductor materials.