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Spin-photon entangling diode.

Christian Flindt1, Anders S Sørensen, Mikhail D Lukin

  • 1MIC-Department of Micro and Nanotechnology, Technical University of Denmark, Kongens Lyngby 2800, Denmark.

Physical Review Letters
|August 7, 2007
PubMed
Summary
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We developed a semiconductor device to create entangled electron spin-photon states, a key step for linking distant spins. This innovation enables electrical control over quantum entanglement for future quantum networks.

Area of Science:

  • Quantum Information Science
  • Semiconductor Spintronics
  • Quantum Optics

Background:

  • Entanglement of distant quantum systems is crucial for quantum communication and computation.
  • Generating entangled electron spin-photon states is a significant challenge in quantum technology.

Purpose of the Study:

  • To propose and analyze a semiconductor device for electrically generating entangled electron spin-photon states.
  • To provide a fundamental building block for entangling distant electron spins.

Main Methods:

  • Utilizing a p-i-n diode structure with a coupled double quantum dot.
  • Employing electronic control of diode bias and local gating.
  • Analyzing the practical performance of the spin-photon entanglement generation.

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Main Results:

  • Demonstrated electrical generation of single photons entangled with electron spins.
  • Showcased robust quantum memory based on electron spins.
  • Analyzed the feasibility of controlled spin-photon entanglement.

Conclusions:

  • The proposed semiconductor device offers a practical method for creating entangled spin-photon states.
  • This technology serves as a foundational element for scalable quantum entanglement distribution.
  • The findings pave the way for advancements in quantum networking and computing.