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Electrically tunable artificial gauge potential for polaritons.

Hyang-Tag Lim1, Emre Togan1, Martin Kroner1

  • 1Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland.

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Researchers created tunable artificial gauge potentials for microcavity exciton polaritons using electric and magnetic fields. This breakthrough enables new studies in quantum physics and strongly correlated photons.

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Area of Science:

  • Quantum optics
  • Condensed matter physics
  • Photonics

Background:

  • Neutral particles can mimic charged particles in magnetic fields via artificial gauge potentials.
  • Previous work demonstrated this in photons (waveguides, edge states) and ultracold atoms (Harper-Hofstadter, Haldane models).

Purpose of the Study:

  • To demonstrate a tunable artificial gauge potential for two-dimensional microcavity exciton polaritons.
  • To explore the magnetoelectric Stark effect as a mechanism for creating gauge potentials for photons.

Main Methods:

  • Applying perpendicular electric and magnetic fields to microcavity exciton polaritons.
  • Performing interferometric measurements to detect the accumulated phase during coherent polariton transport.

Main Results:

  • Successfully generated a tunable artificial gauge potential for exciton polaritons.
  • Verified the potential through phase accumulation measurements in coherent transport.

Conclusions:

  • The magnetoelectric Stark effect provides a versatile route to artificial gauge potentials for photons in polarizable media.
  • This method, combined with polariton interactions and lattices, opens avenues for studying non-equilibrium dynamics of strongly correlated photons.