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Area of Science:

  • Quantum Information Science
  • Superconducting Circuits
  • Quantum Communication Networks

Background:

  • Distributed quantum computing necessitates reliable quantum communication channels.
  • Superconducting circuits use microwave photons for quantum information transfer.
  • Photon loss in transmission is a major challenge for quantum networks.

Purpose of the Study:

  • To propose and demonstrate a heralded protocol for detecting photon loss in quantum communication.
  • To implement a frequency-bin encoding method for microwave photonic modes.
  • To enhance the reliability and accuracy of quantum state transfer in distributed quantum computing networks.

Main Methods:

  • Developed a frequency-bin encoding protocol for microwave photons.
  • Used superconducting circuits to deterministically encode quantum information from a qubit.
  • Simultaneously emitted qubit information into two distinct frequency photonic modes.

Main Results:

  • Achieved a process fidelity of 94.9% for quantum information encoding.
  • Demonstrated the ability to detect photon loss using frequency-bin-encoded photonic modes.
  • Successfully implemented a reliable quantum state transfer method.

Conclusions:

  • The frequency-bin encoding protocol provides a robust method for quantum state transfer.
  • Error detection via photon loss detection significantly enhances distributed quantum computing performance.
  • This work offers a reliable approach for building high-fidelity quantum communication channels.