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Sayak Dasgupta1, Utso Bhattacharya1, Amit Dutta1

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Pulsed driving in the Dicke model reveals new quantum phases and enhanced control over dynamical quantum criticality. Kicked driving offers greater parameter flexibility compared to single-parameter monochromatic drives.

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Area of Science:

  • Quantum optics
  • Condensed matter physics
  • Non-equilibrium dynamics

Background:

  • The Dicke model describes light-matter interactions.
  • Non-equilibrium phase transitions are crucial in quantum systems.
  • Floquet theory analyzes systems under periodic driving.

Purpose of the Study:

  • Investigate pulsed and kicked driving effects on Dicke model phase transitions.
  • Explore control over dynamical quantum criticality.
  • Compare pulsed driving with monochromatic drives.

Main Methods:

  • Application of Floquet theory.
  • Analysis of pulsed and kicked driving protocols.
  • Study of the superradiant to normal phase transition.

Main Results:

  • Emergence of new non-trivial quantum phases under pulsed driving.
  • Enhanced control over quantum criticality via multiple pulse parameters.
  • Increased metastability in first-order transitions with pulsed driving.

Conclusions:

  • Pulsed and kicked driving offer advanced control over quantum systems.
  • Non-monochromatic drives provide superior tunability for quantum criticality.
  • Metastability is influenced by the nature and number of driving pulses.