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Yaniv Tenenbaum Katan1, Daniel Podolsky

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Conventional insulators exposed to spatially modulated light exhibit Floquet topological properties. This technique enables control over bulk modes, photoinduced currents, and fractionalized excitations, drawing parallels with p-wave superconductors.

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Area of Science:

  • Condensed matter physics
  • Quantum mechanics
  • Photonics

Background:

  • Topological insulators possess unique electronic properties protected by topology.
  • Floquet engineering allows for the creation of novel material properties using time-periodic perturbations.
  • Conventional insulators lack the inherent topological characteristics of topological insulators.

Purpose of the Study:

  • To investigate the potential of light-induced Floquet engineering in conventional insulators.
  • To demonstrate precise control over material properties using spatially modulated light.
  • To explore the generation of exotic phenomena like bulk modes and fractionalized excitations.

Main Methods:

  • Applying spatially uniform and modulated light to conventional insulators.
  • Analyzing the resulting Floquet spectra.
  • Observing and characterizing photoinduced currents and fractionalized excitations.
  • Drawing analogies with p-wave superconductors to interpret results.

Main Results:

  • Spatially uniform light induces Floquet spectra resembling those of topological insulators.
  • Spatial modulation of light provides significant control over material properties.
  • Generation of one-dimensional bulk modes, photoinduced currents, and fractionalized excitations is achieved.
  • A strong analogy to p-wave superconductors is established and used for explanation.

Conclusions:

  • Light-induced Floquet engineering in conventional insulators offers a viable route to topological states.
  • Spatially modulated light is a powerful tool for controlling quantum properties.
  • The observed phenomena can be understood through the lens of p-wave superconductivity.