Related Experiment Video
Updated: May 18, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Dynamical Autler-Townes control of a phase qubit
Jian Li1, G S Paraoanu, Katarina Cicak
1O.V. Lounasmaa Laboratory, Aalto University, PO Box 15100, FI-00076 AALTO, Finland. jian.li@aalto.fi
Scientific Reports
|September 12, 2012
Summary
This study shows a superconducting quantum bit can act as a fast ON/OFF switch for microwave photons. This utilizes Autler-Townes splitting for controlling photon transmission in quantum computing applications.
Area of Science:
- Quantum Computing
- Superconducting Circuits
- Quantum Information Science
Background:
- Routers, switches, and repeaters are crucial for classical information processing.
- Future superconducting quantum computers will require analogous components.
- Superconducting qubits are promising candidates for quantum information processing.
Purpose of the Study:
- To experimentally investigate the time evolution of Autler-Townes splitting in a superconducting phase qubit.
- To explore the potential of a superconducting qubit as a switch for microwave photons.
Main Methods:
- Utilized a superconducting phase qubit.
- Applied a control tone resonantly coupled to the second transition.
- Investigated Autler-Townes splitting dynamics.
- Developed and validated a three-level model with relaxation and dephasing parameters.
Main Results:
- Achieved excellent agreement between experimental data and the three-level model.
- Demonstrated the qubit's ability to function as an ON/OFF switch on a 100 ns timescale.
- Showcased suppression of probe photon absorption via Autler-Townes doublet formation.
Conclusions:
- The superconducting qubit can effectively control the transmission of microwave photons.
- Autler-Townes splitting provides a mechanism for switching photon reflection/transmission.
- This switching capability is vital for developing components in quantum computing.
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