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Multilevel interference resonances in strongly driven three-level systems.

Jeroen Danon1, Mark S Rudner1

  • 1Niels Bohr International Academy, and the Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark.

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|December 27, 2014
PubMed
Summary
This summary is machine-generated.

We discovered distinct multiphoton resonance behaviors in driven quantum systems based on whether an integer n is even or odd. This finding, explained by interfering trajectories, is robust against energy fluctuations and dephasing.

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Area of Science:

  • Quantum physics
  • Atomic and molecular systems
  • Solid-state physics

Background:

  • Multiphoton resonances are crucial in driven quantum systems.
  • Understanding these resonances is key for quantum technologies and interpreting experimental data.

Purpose of the Study:

  • Investigate multiphoton resonances in a strongly driven three-level quantum system.
  • Explain the observed differences in resonance behavior for even and odd integers.

Main Methods:

  • Studied a three-level quantum system with a periodically swept energy level.
  • Analyzed behavior near the multiphoton resonance condition nℏω=E.
  • Explained phenomena using interfering trajectories.

Main Results:

  • Observed qualitatively different behaviors for even and odd integer values of n.
  • Demonstrated insensitivity to energy fluctuations of the driven level.
  • Showed robustness in the strong dephasing regime.

Conclusions:

  • The study reveals a fundamental distinction in multiphoton resonance based on integer parity.
  • Interfering trajectories provide a robust explanation for observed phenomena.
  • The findings offer a mechanism to explain experimental observations in systems like double quantum dots.