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Phononic bath engineering of a superconducting qubit
J M Kitzman1, J R Lane2, C Undershute2
1Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824, USA. kitzmanj@msu.edu.
Nature Communications
|July 3, 2023
Summary
Superconducting qubits coupled to surface acoustic wave phonons allow control over phonon spectral properties. This enables novel quantum control and stabilization of qubit states, advancing quantum technology research.
Area of Science:
- Quantum physics
- Quantum computing
- Materials science
Background:
- Phonons (vibrational energy quanta) are crucial in quantum technologies.
- Uncontrolled phonon coupling degrades superconducting qubit performance and causes errors.
Purpose of the Study:
- To investigate a novel platform for open quantum systems using engineered phononic dissipation.
- To demonstrate control over phonon spectral properties and dissipation for quantum applications.
Main Methods:
- Coupling a superconducting qubit to a bath of piezoelectric surface acoustic wave phonons.
- Shaping the qubit's loss spectrum using the engineered phononic bath.
Main Results:
- Demonstrated preparation and dynamical stabilization of superposition states.
- Utilized combined effects of drive and engineered dissipation for quantum state control.
Conclusions:
- Engineered phononic dissipation offers a versatile tool for quantum control.
- This work advances the understanding of mechanical losses in superconducting qubits and their potential applications.
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