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Implementation of an impedance-matched Λ system by dressed-state engineering
Kazuki Koshino1, Kunihiro Inomata, Tsuyoshi Yamamoto
1College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan.
Physical Review Letters
|October 29, 2013
Summary
Researchers demonstrate a superconducting qubit system that enhances light-matter interactions. This setup enables deterministic single microwave photon absorption and down-conversion for qubit applications.
Area of Science:
- Quantum optics
- Superconducting circuits
- Quantum information science
Background:
- Light-matter interactions are enhanced in one-dimensional optical systems through field interference.
- Lambda-type three-level systems facilitate deterministic photon-induced transitions.
Purpose of the Study:
- To implement a Lambda-type three-level system using dressed states of a driven superconducting qubit and resonator.
- To demonstrate single microwave photon detection and photon-qubit swapping.
Main Methods:
- Utilizing dressed states of a driven superconducting qubit coupled to a resonator.
- Engineering impedance-matched conditions for enhanced light-matter coupling.
- Observing photon absorption and down-conversion within the waveguide.
Main Results:
- A single microwave photon deterministically induces a Raman transition, switching the qubit's electronic state.
- Input microwave photons are perfectly absorbed and down-converted into other frequency modes.
- The system exhibits efficient light-matter interaction in a one-dimensional waveguide.
Conclusions:
- The proposed superconducting qubit-resonator system effectively realizes a Lambda-type three-level system.
- This implementation is suitable for single microwave photon detection.
- The setup facilitates the swapping of photon and matter qubits, advancing quantum information processing.
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