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Related Experiment Video

Updated: Sep 23, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Spatial-dependent quantum dot-photon entanglement via tunneling effect.

Yaser Delir Ghaleh Joughi1, Mostafa Sahrai2

  • 1Faculty of Physics, University of Tabriz, Tabriz, Iran. yaserdelir@tabrizu.ac.ir.

Scientific Reports
|May 14, 2022
PubMed
Summary

We explored quantum dot-photon entanglement using vortex beams. Entanglement distribution is controlled by light

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Area of Science:

  • Quantum optics
  • Solid-state physics

Background:

  • Entanglement is crucial for quantum information processing.
  • Controlling quantum dot-photon interactions is key for developing quantum technologies.

Purpose of the Study:

  • To investigate entanglement between a triple-quantum dot molecule and its spontaneous emission field.
  • To demonstrate spatially dependent quantum dot-photon entanglement using Laguerre-Gaussian (LG) fields.

Main Methods:

  • Utilizing optical vortex beams, specifically Laguerre-Gaussian (LG) fields.
  • Controlling quantum tunneling via gate voltage.
  • Manipulating the orbital angular momentum (OAM) of optical vortex beams.

Main Results:

  • Spatially dependent quantum dot-photon entanglement was successfully created.
  • The degree of position-dependent entanglement (DEM) is tunable.
  • DEM is controlled by the OAM of LG light and quantum tunneling effects.

Conclusions:

  • Orbital angular momentum (OAM) and gate voltage offer precise control over entanglement distribution.
  • Tailoring entanglement spatial distribution is achievable by adjusting OAM magnitude and sign.