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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Quantum optics

Background:

  • Pumps are transport mechanisms driven by cyclic potential evolution.
  • Topological origins of pumping are known but require external periodic potentials.
  • Existing experimental systems rely on externally imparted periodic evolution.

Purpose of the Study:

  • To report an emergent mechanism for particle pumping in a quantum gas.
  • To demonstrate particle current generation without an applied periodic drive.
  • To investigate a novel pumping mechanism in quantum systems coupled to optical resonators.

Main Methods:

  • Coupling a quantum gas to an optical resonator.
  • Utilizing a self-consistent cavity field to form a pumping potential.
  • Leveraging dissipation-induced cavity field evolution between quadratures.
  • Measuring phase winding of the cavity field and observing atomic motion in situ.

Main Results:

  • Observed particle current in a quantum gas without external periodic driving.
  • Demonstrated an emergent pumping mechanism driven by self-consistent cavity fields.
  • The system exhibited a time-periodic potential analogous to topological models like the Rice-Mele pump.
  • The observed dynamics combined topological and open system properties.

Conclusions:

  • An emergent pumping mechanism has been identified in a quantum gas-optical resonator system.
  • This mechanism generates particle currents without external periodic drives, driven by self-consistent fields.
  • The system exhibits characteristics of continuous dissipative time crystals, merging topological and open system dynamics.