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Updated: Aug 12, 2025
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Frequency Combs with Parity-Protected Cross-Correlations and Entanglement from Dynamically Modulated Qubit Arrays
Denis Ilin1,2, Alexander V Poshakinskiy2, Alexander N Poddubny3
1Department of Physics and Technology, ITMO University, St. Petersburg, 197101, Russia.
Physical Review Letters
|January 27, 2023
Summary
We developed a method to control quantum correlations and entanglement in superconducting qubits. This technique uses modulated frequencies to generate specific photon behaviors, enabling new quantum control possibilities.
Area of Science:
- Quantum physics
- Quantum optics
- Condensed matter physics
Background:
- Superconducting qubits are promising for quantum technologies.
- Controlling quantum correlations and entanglement is crucial for quantum information processing.
- Frequency-comb generation in quantum systems offers unique spectral properties.
Purpose of the Study:
- To develop a theoretical framework for dynamically engineering quantum correlations and entanglement.
- To investigate the effects of temporal modulation of qubit resonance frequencies.
- To explore the generation of specific quantum states and correlations in frequency-comb emission.
Main Methods:
- Developing a general theoretical framework for dynamical control.
- Rigorous accounting for temporal modulation of superconducting qubit resonance frequencies.
- Utilizing dynamical conversion between quantum excitations with different parity symmetry.
Main Results:
- Demonstrated simultaneous bunching and antibunching in cross-correlations.
- Achieved Bell states of scattered photons from different sidebands.
- Showcased the universality of the approach for controlling multiparticle correlations.
Conclusions:
- The developed framework allows dynamic engineering of quantum correlations and entanglement.
- Periodic modulation of qubit frequencies with a π phase shift enables precise control over photon statistics.
- The method is applicable to generic dynamically modulated dissipative quantum systems for multiparticle correlation control.
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