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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Atomic physics

Background:

  • Complex phenomena often arise from simple models, yet imperfections like disorder can significantly alter system behavior.
  • While disordered potentials are well-studied, experimental research on disordered hopping is emerging.
  • Disorder in hopping can lead to non-trivial collective behaviors and altered transport properties.

Purpose of the Study:

  • To experimentally investigate disordered hopping in a three-dimensional Rydberg system.
  • To map the Rydberg system onto a simplified XY model with random couplings.
  • To explore the localization-delocalization crossover phenomenon in such systems.

Main Methods:

  • Utilizing a dipole-dipole-interacting three-dimensional Rydberg system.
  • Employing spectroscopic evidence to map the system onto an XY model with random couplings.
  • Observing and analyzing experimental signatures of the localization-delocalization crossover.

Main Results:

  • Successfully mapped the Rydberg system to an XY model with random couplings.
  • Observed experimental signatures indicative of a localization-delocalization crossover.
  • Demonstrated the emergence of non-trivial collective behavior due to disordered hopping.

Conclusions:

  • Rydberg systems serve as a powerful experimental platform for studying random hopping models.
  • This platform provides high-level control for investigating transport processes and localization phenomena.
  • The study opens new avenues for exploring the impact of disorder in quantum systems.