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Related Experiment Video

Updated: Jun 7, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Tunable quantum beam splitters for coherent manipulation of a solid-state tripartite qubit system.

Guozhu Sun¹, Xueda Wen, Bo Mao

¹Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China.

Nature Communications

|October 27, 2010

Summary

Researchers achieved coherent control of quantum states in a tripartite system using a superconducting qubit and two-level systems (TLSs). This breakthrough utilizes Landau-Zener-Stückelberg interference for precise quantum wave function manipulation in multipartite systems.

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Area of Science:

Quantum Computing
Solid-State Physics
Quantum Information Science

Background:

Coherent control of quantum states is crucial for quantum processors and macroscopic quantum mechanics.
Controlling multipartite quantum systems with artificial qubits is challenging due to short decoherence times and imprecise methods.

Purpose of the Study:

To demonstrate coherent manipulation of quantum states in a tripartite system.
To explore novel control methods for multipartite quantum systems.

Main Methods:

Creation of a tripartite quantum system using a superconducting qubit coupled to two microscopic two-level systems (TLSs).
Utilizing avoided crossings in the energy-level spectrum as tunable quantum beam splitters.
Applying Landau-Zener-Stückelberg interference for quantum state control.

Main Results:

Successfully created and coherently manipulated quantum states in the tripartite system.
Demonstrated that qubit-TLS interactions create tunable quantum beam splitters.
Showcased the potential of Landau-Zener-Stückelberg interference for precise control.

Conclusions:

The developed tripartite system enables precise control over quantum states.
Landau-Zener-Stückelberg interference is a powerful tool for quantum state manipulation in complex systems.
This work advances the development of solid-state quantum processors.