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Interfacing quantum-optical and solid-state qubits.

L Tian1, P Rabl, R Blatt

  • 1Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria.

Physical Review Letters
|July 13, 2004
PubMed
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We developed a model for linking quantum-optical and solid-state qubits using superconducting cavities. This approach enhances qubit coupling and enables efficient information transfer between different quantum systems.

Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Quantum Optics

Background:

  • Quantum systems, such as trapped ions and solid-state qubits (e.g., Cooper pair boxes), are crucial for quantum computing.
  • Efficiently coupling these disparate quantum systems presents a significant experimental challenge.
  • Interfacing different qubit modalities is essential for scalable quantum information processing.

Purpose of the Study:

  • To present a generic model for coupling quantum-optical and solid-state qubits.
  • To introduce protocols for information transfer between these coupled systems.
  • To demonstrate the use of a superconducting cavity as an intermediary for enhanced coupling and compatibility.

Main Methods:

  • Development of a theoretical model for hybrid quantum systems.

Related Experiment Videos

  • Utilizing a superconducting cavity to mediate interactions between a trapped ion and a charge qubit.
  • Designing quantum transfer protocols tailored for the hybrid system.

    • Main Results:

    • A generic model for coupling quantum-optical (trapped ion) and solid-state (Cooper pair box) qubits was established.
    • The superconducting cavity effectively enhances the coupling strength between the disparate qubit types.
    • Successful demonstration of information transfer protocols between the coupled qubits was theoretically validated.

    Conclusions:

    • The proposed model provides a versatile framework for interfacing quantum-optical and solid-state qubits.
    • Superconducting cavities serve as effective elements for enhancing qubit-qubit coupling and ensuring experimental compatibility.
    • The developed transfer protocols pave the way for hybrid quantum information processing architectures.