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Superadiabatic population transfer in a three-level superconducting circuit.
Antti Vepsäläinen1, Sergey Danilin1, Gheorghe Sorin Paraoanu1
1Low Temperature Laboratory, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 AALTO, Finland.
Science Advances
|February 21, 2019
Summary
We sped up quantum state transfer in superconducting circuits using a novel superadiabatic technique. This method suppresses unwanted excitations, enabling faster and more reliable population transfer for quantum information processing.
Area of Science:
- Quantum Information Science
- Superconducting Quantum Circuits
- Quantum State Manipulation
Background:
- Adiabatic manipulation is crucial for quantum information processing.
- Superconducting transmon circuits are key platforms for quantum computation.
- Nonadiabatic excitations can hinder the efficiency of quantum state transfer.
Purpose of the Study:
- To demonstrate a speedup in adiabatic population transfer.
- To suppress nonadiabatic excitations in a three-level transmon circuit.
- To achieve fast and robust ground-to-excited state population transfer.
Main Methods:
- Utilized a three-level superconducting transmon circuit.
- Employed a superadiabatic technique involving a two-photon microwave pulse.
- Applied the method to stimulated Raman adiabatic passage.
Main Results:
- Successfully suppressed spurious nonadiabatic excitations.
- Achieved a significant speedup in adiabatic population transfer.
- Demonstrated robust transfer from the ground to the second excited state.
Conclusions:
- The superadiabatic method enhances the speed and robustness of quantum state transfer.
- This technique is vital for advancing quantum information processing applications.
- Validated the efficacy of two-photon pulses in controlling quantum dynamics.
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