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Quantum-enabled operation of a microwave-optical interface.

Rishabh Sahu1, William Hease2, Alfredo Rueda2

  • 1Institute of Science and Technology Austria, am Campus 1, 3400, Klosterneuburg, Austria. rsahu@ist.ac.at.

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Summary
This summary is machine-generated.

We developed a low-noise electro-optic interface for quantum networks. This system achieves high transduction efficiency, enabling efficient quantum signal conversion for future quantum communication protocols.

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Area of Science:

  • Quantum optics
  • Solid-state quantum systems
  • Quantum information science

Background:

  • Solid-state microwave systems excel at quantum logic and sensing.
  • Photons at telecom wavelengths are optimal for low-loss quantum interconnects.
  • A low-noise interface is crucial for single-photon effects in quantum networks.

Purpose of the Study:

  • To demonstrate a general-purpose electro-optic interface for quantum networks.
  • To achieve high transduction efficiency with minimal input noise.
  • To enable near-term heralded quantum network protocols.

Main Methods:

  • Coherent electro-optic modulation on nanosecond timescales.
  • Utilizing short, high-power optical pump pulses.
  • Minimizing microwave input noise to below 1 quanta.

Main Results:

  • Achieved 8.7% bidirectional transduction efficiency (up to 15%).
  • Demonstrated near-unity cooperativity in electro-optic interaction.
  • Reached internal pure conversion efficiency up to 99.5% with low mode occupancy.

Conclusions:

  • The developed interface meets requirements for heralded quantum network protocols.
  • Evidence for electro-optic laser cooling and vacuum amplification was observed.
  • This work advances quantum interconnects for scalable quantum networks.