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Structural Dynamics and Strong Correlations in Dynamical Quantum Optical Lattices.

Adrián U Ramírez-Barajas1, Santiago F Caballero-Benitez1

  • 1Universidad Nacional Autónoma de México, Instituto de Física, LSCSC-LANMAC, Ciudad de México 04510, Mexico.

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|October 5, 2025
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Summary
This summary is machine-generated.

Ultracold atomic gases in optical cavities exhibit new quantum phases. Researchers explored superradiant self-organization and its interplay with superfluid and Mott insulator phases, revealing structural transitions driven by light-matter interactions.

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Area of Science:

  • Quantum optics
  • Atomic physics
  • Condensed matter theory

Background:

  • Ultracold atomic gases in optical cavities enhance light-matter coupling, enabling nonlinear atomic dynamics.
  • Superradiant self-organized phases have been observed in cavity-pumped atomic gases.
  • These systems offer a platform for quantum simulation of interacting models.

Purpose of the Study:

  • To explore quantum many-body phases of bosonic atoms in an optical cavity under blue detuned pumping.
  • To investigate the strongly interacting regime by tuning atomic scattering length.
  • To analyze the interplay between superradiant self-organization and superfluid/Mott insulator phases.

Main Methods:

  • Utilized a transverse blue detuned optical lattice to pump the atomic gas.
  • Investigated the strongly interacting regime via s-wave scattering length manipulation.
  • Employed the light-matter density matrix renormalization group (DMRG) framework.

Main Results:

  • Observed structural phase transitions driven by cavity light and atomic collisions.
  • Analyzed the interplay between superradiance, superfluidity, and Mott insulator phases without higher bands.
  • Identified mode softening at critical points of quantum phase transitions.

Conclusions:

  • The study reveals novel quantum many-body phases in cavity-based atomic systems.
  • The developed theoretical framework (light-matter DMRG) is suitable for analyzing strong quantum correlations.
  • Findings provide insights into light-matter interactions and quantum simulation possibilities.