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Localization Driven Superradiant Instability.

Honghao Yin1, Jie Hu1, An-Chun Ji1

  • 1Department of Physics, Capital Normal University, Beijing 100048, China.

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Anderson localization drives a novel superradiant instability in a hybrid quantum system. This effect, observed in localized bosons, leads to a critical optical pumping near zero, contrasting with standard superradiance in extended states.

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Area of Science:

  • Quantum Optics
  • Condensed Matter Physics
  • Atomic Physics

Background:

  • The Dicke superradiant phase typically emerges from coupling atoms to optical cavities above a pumping threshold.
  • Anderson localization describes the wave function localization in disordered systems.

Purpose of the Study:

  • To predict and investigate a superradiant instability driven by Anderson localization in a hybrid quantum system.
  • To explore the behavior of the Dicke superradiant phase in the context of the Aubry-André (DAA) model for localized bosons.

Main Methods:

  • Utilizing a hybrid system combining the Dicke model with the Aubry-André (DAA) model for bosons in a 1D quasiperiodic optical lattice coupled to a cavity.
  • Analyzing the conditions under which resonant superradiant scattering is induced in localized bosonic phases.

Main Results:

  • A superradiant instability driven by Anderson localization is predicted, with the critical optical pumping approaching zero.
  • This localization-driven superradiant instability contrasts sharply with superradiance observed in extended states.
  • The phenomenon is shown to be largely insensitive to system temperature.

Conclusions:

  • Anderson localization can induce a novel form of superradiant instability in quantum systems.
  • This effect provides a new perspective on Dicke superradiance, distinct from traditional observations in extended condensates.
  • The predicted phenomenon is experimentally accessible with current technologies.