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Noise-induced quantum synchronization with entangled oscillations
Ziyu Tao1,2,3,4, Finn Schmolke5, Chang-Kang Hu1,2,3,4
1International Quantum Academy, Futian District, Shenzhen, Guangdong, China.
Nature Communications
|September 26, 2025
Summary
Noise can surprisingly drive quantum synchronization in superconducting qubits. This study observed noise-induced synchronization and entanglement in a qubit chain, showing noise
Area of Science:
- Quantum physics
- Complex systems
- Condensed matter physics
Background:
- Complex systems can exhibit cooperative effects due to random fluctuations.
- Quantum systems, such as superconducting qubits, are typically studied under controlled conditions, minimizing noise.
Purpose of the Study:
- To investigate the phenomenon of noise-induced quantum synchronization in a chain of superconducting transmon qubits.
- To explore the entanglement properties of synchronized qubits and the stability of synchronization and entanglement.
Main Methods:
- Utilizing a chain of superconducting transmon qubits with nearest-neighbor interactions.
- Applying Gaussian white noise to a single site of the qubit chain.
- Analyzing qubit oscillations, entanglement (concurrence), and stability using generalized Arnold tongue diagrams.
Main Results:
- Observed noise-induced quantum synchronization across the entire qubit chain initiated by noise on a single site.
- Demonstrated entanglement between the two synchronized end qubits, identifying them as maximally entangled mixed states.
- Showcased the stability of both synchronization and entanglement against frequency detuning.
Conclusions:
- Noise can have a constructive influence, leading to collective synchronization and entanglement in quantum many-body systems.
- This work opens avenues for exploring quantum synchronization with correlations exceeding classical limits.
- The findings highlight the potential of engineered noise in controlling quantum systems.
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