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Setting Limits on Supersymmetry Using Simplified Models
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Driven Imposters: Controlling Expectations in Many-Body Systems.

Gerard McCaul1, Christopher Orthodoxou2, Kurt Jacobs3,4,5

  • 1Tulane University, New Orleans, Louisiana 70118, USA.

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|May 23, 2020
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Summary
This summary is machine-generated.

This study introduces a framework to control electron system dynamics using laser fields. Researchers demonstrated precise control over electron currents and optical responses in Fermi-Hubbard models, creating "driven imposters."

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Area of Science:

  • Condensed Matter Physics
  • Quantum Control
  • Materials Science

Background:

  • Correlated electron systems exhibit complex behaviors influenced by external fields.
  • Precisely controlling these systems is crucial for developing novel quantum materials and devices.
  • Laser-driven dynamics offer a pathway to manipulate electronic properties.

Purpose of the Study:

  • To develop a general framework for controlling observables in laser-driven correlated electron systems.
  • To determine the specific laser driving required for predetermined evolutions of system observables.
  • To explore the application of this framework to the Fermi-Hubbard model.

Main Methods:

  • Formulation of a theoretical framework for laser-driven quantum control.
  • Application of the framework to calculate laser fields for controlling current in a Fermi-Hubbard system.
  • Simulation of electron dynamics and optical responses in both metallic and Mott insulating regimes.

Main Results:

  • A method to prescribe laser driving for arbitrary observable evolution with bounded expectation values.
  • Exact control of nonlinear high-harmonic generation and electron dynamics in the Fermi-Hubbard model.
  • Demonstration of 'driven imposters' by flipping optical responses between metallic and Mott insulating states.

Conclusions:

  • The developed framework enables precise control over the dynamics of correlated electron systems.
  • This approach allows for the customization of material properties through tailored laser driving.
  • Opens new avenues for designing materials with designer optical and electronic responses.