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  3. Polaron Catastrophe Within Quantum Acoustics.
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Polaron catastrophe within quantum acoustics.

Alhun Aydin1,2, Joonas Keski-Rahkonen2,3, Anton M Graf2,3,4

  • 1Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla 34956, Istanbul, Türkiye.

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|June 3, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

The quantum acoustic framework models electron-lattice interactions, revealing conditions for acoustic polaron formation. These quasiparticles are favored by low temperatures and specific material properties, with external fields having a minor impact.

Keywords:
acoustic polaroncoherent stateswave packet propagation

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Area of Science:

  • Condensed Matter Physics
  • Quantum Mechanics

Background:

  • Electron-lattice interactions are crucial in quantum materials.
  • Traditional perturbative methods often obscure complex dynamics.
  • A quantum acoustic framework offers a nonperturbative, coherent approach.

Purpose of the Study:

  • To model strongly coupled electron-lattice dynamics using the quantum acoustic framework.
  • To investigate the formation and properties of acoustic polarons.
  • To explore the influence of material parameters and external fields on polaron dynamics.

Main Methods:

  • Representing lattice vibrations as coherent states and electrons as quantum wave packets.
  • Deriving and numerically implementing electron backaction on the lattice.
  • Calculating polaron binding energies and key observables over time.

Main Results:

  • Identified conditions favoring acoustic polaron formation: low temperatures, high deformation potentials, slow sound velocities, and high effective masses.
  • Observed electron wave packet evolution and polaron formation.
  • Found polaron formation is robust under moderate electric and magnetic fields, but suppressed at higher strengths.

Conclusions:

  • The quantum acoustic framework provides insights into electron-lattice interactions and polaron dynamics.
  • Understanding polaron formation is key to exploring nontrivial transport in quantum materials.
  • This work lays the groundwork for future investigations into quantum material properties.