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Suppression of Interband Heating for Random Driving.

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Controlling particle excitation in driven quantum systems is challenging. This study demonstrates that random multipolar drives can precisely control particle excitation, enabling observation of nonequilibrium phenomena in a long-lived prethermal state.

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Area of Science:

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

Background:

  • High-lying state excitation limits observing driven non-equilibrium phenomena.
  • Broad spectrum drives exacerbate particle heating.
  • Controlling quantum states under external drives is crucial.

Purpose of the Study:

  • To investigate methods for controlling particle excitation in driven quantum systems.
  • To explore the potential of structured random drives for mitigating heating.
  • To enable observation of drive-induced phenomena in a stable regime.

Main Methods:

  • Theoretical analysis of random multipolar drives.
  • Investigating particle excitation dynamics in the lowest energy band.
  • Exploring parameter regimes away from high-frequency driving.

Main Results:

  • Particle excitation to higher bands is controllable with random multipolar drives.
  • Heating can be suppressed even with broad spectrum drives.
  • A long-lived prethermal regime in the lowest band is accessible.

Conclusions:

  • Random multipolar drives offer a pathway to control quantum systems under non-equilibrium conditions.
  • This control facilitates the experimental observation of drive-induced phenomena.
  • The findings open new avenues for exploring quantum dynamics.