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Area of Science:

  • Atomic physics
  • Condensed matter physics
  • Quantum optics

Background:

  • Laser-cooled atomic ensembles can exhibit complex emergent phenomena.
  • Light-mediated interactions and optical feedback can induce spontaneous magnetism.
  • Symmetry breaking is a key concept in understanding phase transitions and emergent behaviors.

Purpose of the Study:

  • To investigate the ground state properties of laser-driven Rubidium atoms.
  • To observe and characterize spontaneously drifting coupled spin and quadrupolar density waves.
  • To demonstrate a novel transport process in out-of-equilibrium magnetic systems.

Main Methods:

  • Utilizing laser-cooled Rubidium atoms.
  • Applying optical feedback via a retroreflecting mirror.
  • Observing spontaneous magnetism through light-mediated interactions.

Main Results:

  • Observation of spontaneously drifting coupled spin and quadrupolar density waves.
  • Demonstration of spontaneous magnetism in the atomic ensemble.
  • Identification of spontaneous symmetry breaking as the origin of wave drift and chirality.

Conclusions:

  • Laser-driven Rubidium atoms can form spontaneously drifting spin and quadrupolar density waves.
  • Light-mediated interactions and optical feedback are crucial for emergent magnetism and wave formation.
  • This work reveals a novel transport process in driven, out-of-equilibrium magnetic systems.