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Entanglement transfer in a composite electron-ion-photon system.

Axel Stenquist1, Jakob Nicolai Nicolai Bruhnke1, Felipe Zapata2

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Summary
This summary is machine-generated.

This study reveals how quantum entanglement transfers from an electron-ion pair to an electron-photon pair during photoionization. Researchers used time-resolved von Neumann entropies to track this information sharing process.

Keywords:
Rabi oscillationsentanglemententanglement transferfluorescencephotoionizationstrong couplingultrafast

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Area of Science:

  • Quantum mechanics
  • Atomic and molecular physics
  • Quantum information science

Background:

  • Photoionization is a fundamental process where a photon ejects an electron from an atom or molecule.
  • Entanglement, a quantum mechanical phenomenon, plays a crucial role in understanding particle interactions.
  • Information sharing between quantum particles is key to quantum technologies.

Purpose of the Study:

  • To investigate the transfer of quantum entanglement during photoionization.
  • To quantify information sharing between electrons, ions, and photons.
  • To explore methods for observing and controlling entanglement dynamics.

Main Methods:

  • Utilizing time-resolved von Neumann entropies to analyze quantum information.
  • Studying the dynamics of electron-ion and electron-photon pairs.
  • Employing a phase-locked two-pulse laser sequence for controlled excitation.

Main Results:

  • Demonstrated entanglement transfer from an electron-ion pair to an electron-photon pair via fluorescence.
  • Observed multipartite entanglement involving the electron, ion, and photon on intermediate timescales.
  • Established a method using time symmetry and strong coupling to reveal entanglement transfer.

Conclusions:

  • Entanglement transfer in photoionization is a quantifiable process.
  • Time-resolved entropy measurements provide insights into quantum information dynamics.
  • Coincidence measurements of photon number and electron kinetic energy can probe entanglement dynamics.